I need help with these two questions please

I Need Help With These Two Questions Please

Answers

Answer 1
The black one looks great but the white ones look a bit off and the white one is too much to be a problem with a white dial watch with the blue one is a little too much to handle with the blue and white dial I don’t think it fits in that price but it’s definitely not worth a price for me if it’s a white one and I don’t want to get a black dial

Related Questions

Which class of material is generally associated with the highest density values at room temperature?
-Polymers
-Composites
-Metals
-Ceramics

Answers

Metals are generally associated with the highest density values at room temperature.

A metals is a substance that, when freshly prepared, polished, or broken, exhibits a brilliant look and conducts electricity and heat quite well (from the Greek word métallon, "mine, quarry, metal"). Typically, metals are malleable and ductile (can be drawn into wires) (they can be hammered into thin sheets). These characteristics are the outcome of the metallic link that exists between the metal's atoms or molecules.A metal can be a chemical element like iron, an alloy like stainless steel, a molecular complex like polymeric sulphur nitride, or any combination of these.

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The molecules in the reactionNH3(g) + 3 F2(g) ----> NF3(g) + 3HF(g)contain only single bonds. What is the heat evolved or absorbed permole of NH3 that reacts? These bond energy values might be useful:H-F 566 kJ/mol, F-F 158 kJ/mol, N-H 391 kJ/mol, N-F 272 kJ/mol.1. −566 kJ/mol2. −867 kJ/mol3. −1105 kJ/mol4. -289 kJ/mol5. +867 kJ/mol6. +1105 kJ/mol

Answers

The calculated answer is −867 kJ/mol3. Changes in physical or chemical processes frequently include the transfer of energy.

According to the rule of conservation of energy, energy is neither generated nor destroyed during any physical or chemical activity. In other words, the universe's whole supply of energy is kept in check. We must first identify two aspects of the universe, the system and the surrounds, in order to properly comprehend the energy changes that occur throughout a reaction. The particular area of matter in a given place that is being examined during an experiment or observation is referred to as the system. These bond energy values might be useful: H-F 566 kJ/mol,

F-F 158 kJ/mol, N-H 391 kJ/mol,
N-F 272 kJ/mol.1. −566 kJ/mol2. −867 kJ/mol3. −1105 kJ/mol4. -289 kJ/mol5. +867 kJ/mol6. +1105 kJ/mol

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all my silver or white gold jewelry shoots yellow orange how do i ajust my white balance to photograph silver diamond jewelry?

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White balance is an important setting in photography that adjusts the overall color temperature of an image. To photograph silver or white gold jewelry and reduce the yellow or orange tint.

Follow these steps: Use a gray card: Place a gray card next to the jewelry and take a photo. Then, in post-processing software, use the white balance tool to select the gray card and adjust the white balance.

Use a custom white balance: Take a photo of the jewelry with a neutral color, such as white or gray, in the same lighting conditions. Then, in post-processing software, use the custom white balance tool to set the white balance based on this image.

Manually adjust the white balance: If you do not have access to a gray card or a neutral color, you can manually adjust the white balance in post-processing software by adjusting the temperature and tint sliders until the jewelry appears white or silver in the image.

It's also important to consider the lighting conditions when photographing jewelry. Using a color-corrected light source, such as daylight-balanced LED lights, can help reduce the yellow or orange tint in the image.

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The enthalpy of complete combustion of natural gas which consists of mostly methane, CH4(g), to give gaseous products is abc.d kJ.
CH4 + 2 O2 → CO2 + 2 H2O(g)
sheets to help
magnesium hydroxide Mg(OH)2(s) – 924.5
magnesium oxide MgO(s) – 601.6
magnesium sulfate MgSO4(s) – 1 284.9
manganese(II) oxide MnO(s) – 385.2
manganese(IV) oxide MnO2(s) – 520.0
mercury(II) oxide (red) HgO(s) – 90.8
mercury(II) sulfide (red) HgS(s) – 58.2
methanal (formaldehyde) CH2O(g) – 108.6
methane CH4(g) – 74.6
methanoic acid (formic acid) HCOOH(l) – 425.0
methanol CH3OH(l) – 239.2
nickel(II) oxide NiO(s) – 240.6
nitric acid HNO3(l) – 174.1
nitrogen dioxide NO2(g) + 33.2
nitrogen monoxide NO(g) + 91.3
octane C8H18(l) – 250.1
pentane C5H12(l) – 173.5
phosphorus pentachloride PCl5(s) – 443.5
phosphorus trichloride (liquid) PCl3(l) – 319.7
phosphorus trichloride (vapour) PCl3(g) – 287.0
potassium bromide KBr(s) – 393.8
potassium chlorate KClO3(s) – 397.7
potassium chloride KCl(s) – 436.5
potassium hydroxide KOH(s) – 424.6
propane C3H8(g) – 103.8
silicon dioxide (α-quartz) SiO2(s) – 910.7
silver bromide AgBr(s) – 100.4
silver chloride AgCl(s) – 127.0
silver iodide AgI(s) – 61.8
sodium bromide NaBr(s) – 361.1
sodium chloride NaCl(s) – 411.2
sodium hydroxide NaOH(s) – 425.8
sodium iodide NaI(s) – 287.8
sucrose C12H22O11(s) – 2 226.1
sulfur dioxide SO2(g) – 296.8
sulfuric acid H2SO4(l) – 814.0
sulfur trioxide (liquid) SO3(l) – 441.0
sulfur trioxide (vapour) SO3(g) – 395.7
tin(II) chloride SnCl2(s) – 325.1
tin(IV) chloride SnCl4(l) – 511.3
tin(II) oxide SnO(s) – 280.7
tin(IV) oxide SnO2(s) – 577.6
water (liquid) H2O(l) – 285.8
water (vapour) H2O(g) – 241.8
zinc oxide ZnO(s) – 350.5
zinc sulfide (sphalerite) ZnS(s) – 206.0
pg1 (of help sheet)
aluminium oxide Al2O3(s) –1 675.7
ammonia NH3(g) –45.9
ammonium chloride NH4Cl(s) –314.4
ammonium nitrate NH4NO3(s) –365.6
barium carbonate BaCO3(s) –1 213.0
barium chloride BaCl2(s) –855.0
barium hydroxide Ba(OH)2(s) –944.7
barium oxide BaO(s) –548.0
barium sulfate BaSO4(s) –1 473.2
benzene C6H6(l) +49.1
butane C4H10(g) –125.7
calcium carbonate CaCO3(s) –1 207.6
calcium chloride CaCl2(s) –795.4
calcium hydroxide Ca(OH)2(s) –985.2
calcium oxide CaO(s) –634.9
calcium sulfate CaSO4(s) –1 434.5
carbon dioxide CO2(g) –393.5
carbon monoxide CO(g) –110.5
chromium(III) oxide Cr2O3(s) –1 139.7
copper(I) oxide Cu2O(s) –168.6
copper(II) oxide CuO(s) –157.3
copper(II) sulfate CuSO4(s) –771.4
copper(I) sulfide Cu2S(s) –79.5
copper(II) sulfide CuS(s) –53.1
dinitrogen tetroxide N2O4(g) +11.1
ethane C2H6(g) –84.0
ethanoic acid (acetic acid) CH3COOH(l) –484.3
ethanol C2H5OH(l) –277.6
ethene (ethylene) C2H4(g) +52.4
ethyne (acetylene) C2H2(g) +227.4
glucose C6H12O6(s) –1 273.3
hydrogen bromide HBr(g) –36.3
hydrogen chloride HCl(g) –92.3
hydrogen fluoride HF(g) –273.3
hydrogen iodide HI(g) +26.5
hydrogen perchlorate HClO4(l) –40.6
hydrogen peroxide H2O2(l) –187.8
hydrogen sulfide H2S(g) –20.6
iron(II) oxide FeO(s) –272.0
iron(III) oxide Fe2O3(s) –824.2
iron(II,III) oxide (magnetite) Fe3O4(s) –1 118.4
lead(II) bromide PbBr2(s) –278.7
lead(II) chloride PbCl2(s) –359.4
lead(II) oxide (red) PbO(s) –219.0
lead(IV) oxide PbO2(s) –277.4
magnesium carbonate MgCO3(s) –1 095.8
magnesium chloride MgCl2(s) –641.3
pg2 help sheet

Answers

The enthalpy of complete combustion of natural gas (methane) to give gaseous products is -890.3 kJ/mol.

The complete combustion of methane (CH4(g)) results in the formation of carbon dioxide (CO2) and water vapor (H2O(g)). The standard enthalpy change for this reaction, ΔH°, is the enthalpy of complete combustion of natural gas.

The standard enthalpy of formation for methane is -74.87 kJ/mol and for carbon dioxide is -393.5 kJ/mol. The standard enthalpy of formation for water is -285.8 kJ/mol.

The standard enthalpy change for the reaction can be calculated using the standard enthalpies of formation of the reactants and products:

ΔH° = ΔH°f (products) - ΔH°f (reactants)

ΔH° = [(2 x -285.8) + (-393.5)] - [-74.87 + (2 x 0)]

ΔH° = (-285.8 x 2) - 393.5 + 74.87

ΔH° = -890.3 kJ/mol

So, the enthalpy of complete combustion of natural gas (methane) to give gaseous products is -890.3 kJ/mol.

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how does the subunits of a nucleic acid affect its structure

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The subunits of a nucleic acid determine the encoded biological information and affect the structure as they dictate the structural stability of the molecule.

Nucleic acids are basically macromolecules which are very essential for life. They contain simpler subunits which are able to dictate the biological information which is being coded.

These subunits are basically the building blocks and hence they also dictate the structural stability of the nucleic acid. If there is any change in these subunits, it will lead to a change in the biological product that is encoded and also bring about a change in the structure stability of the nucleic acid.

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at what temperature would a 0.291 m solution of magnesium sulfate (mgso₄) in water exhibit an osmotic pressure of 14.0 atm? assume magnesium sulfate completely dissociates. r = 0.08206 l・atm/k・mol

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31.25 °C is the temperature at which a 0.291 m solution of magnesium sulfate in water exhibit an osmotic pressure of 14.0 atm.

The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points and thermometric substances. The most popular scales are the Celsius scale, sometimes known as centigrade, with the unit symbol °C, the Fahrenheit scale (°F), and the Kelvin scale (K), with the latter being mostly used for scientific purposes. One of the International System of Units' (SI) seven base units is the kelvin.

π = MRT

14.0 atm = M(0.08206 L·atm/K·mol)T

M = 214.5/T

0.291 L = moles of solute / 1 L

moles of solute = 0.291 M

moles of [tex]Mg^2+[/tex] = 2 x moles of MgSO[tex]_4[/tex]= 2 x 0.291 M = 0.582 M

Π = iMRT

Π = 3 x 0.582 M x (0.08206 L·atm/K·mol) x T

14.0 atm = 0.448 Atm·K·mol/L x T

T = 31.25 °C

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Saltpetre is a rock which occurs in Chile. It contains iodine in the form of
sodium iodate(V), NalO,.
Sodium thiosulphate solution was used to find the concentration of a solution of
sodium iodate(V).
(i) The experiment used 36-0 cm' of a sodium thiosulphate solution of
concentration 0-100 mol dm.
Calculate the number of moles of sodium thiosulphate present in this solution.
(ii) Six moles of sodium thiosulphate were needed for each mole of the
sodium iodate(V).
State the number of moles of sodium iodate(V) present in the sample.
[1]
(iii) The volume of sodium iodate(V) solution used in the experiment was 50-0cm'.
Calculate the concentration of the sodium iodate(V) solution in mol dm. [1]
(iv) Use your answer to (iii) to calculate the concentration of the sodium iodate(V)
solution in g dm.
[1]
The relative molecular mass of sodium iodate(V) is 198.

Answers

Answer:

(i) To calculate the number of moles of sodium thiosulphate present in the solution, we can use the formula:

moles = concentration x volume

The concentration of the sodium thiosulphate solution is given as 0.100 mol dm^-3 and the volume is 36.0 cm^3.

We can calculate the number of moles of sodium thiosulphate as:

moles = 0.100 mol dm^-3 x (36.0 cm^3 / 1000 cm^3/dm^3) = 0.0036 mol

(ii) We are told that six moles of sodium thiosulphate were needed for each mole of sodium iodate(V). So, we can calculate the number of moles of sodium iodate(V) in the sample as:

moles of sodium iodate(V) = moles of sodium thiosulphate / 6

moles of sodium iodate(V) = 0.0036 mol / 6 = 6.00 x 10^-4 mol

(iii) To calculate the concentration of the sodium iodate(V) solution in mol dm^-3, we can use the formula:

concentration = moles of solute / volume of solution

The number of moles of sodium iodate(V) is 6.00 x 10^-4 mol and the volume of the solution is 50.0 cm^3.

so,

concentration = 6.00 x 10^-4 mol / (50.0 cm^3 / 1000 cm^3/dm^3) = 1.2 x 10^-4 mol dm^-3

(iv) To calculate the concentration of the sodium iodate(V) solution in g dm^-3, we can use the formula:

concentration in g dm^-3 = molar mass x concentration in mol dm^-3

The molar mass of sodium iodate(V) is 198 g/mol.

so,

concentration in g dm^-3 = 198 g/mol x 1.2 x 10^-4 mol dm^-3 = 0.00237 g dm^-3

This is the final concentration of sodium iodate(V) solution in g dm^-3.

a 1.371 g sample contains only vitamin c (c6h8o6) and sucralose (c12h19cl3o8). when the sample is dissolved in water to a total volume of 28.0 ml, the osmotic pressure of the solution is 5.61 atm at 305 k. what is the mass percent of vitamin c and sucralose in the sample?

Answers

Sucralose is present in the sample at a mass percent of 97.35 % and vitamin C at 2.65%

Mass  percent can be calculate as follows:

We can calculate the moles from osmotic pressure formula

Π = iMRT (Osmotic pressure) 

Van't Hoff factor i = 1

moles/volume = M

Now,

ππ= inVRT ——> (1)

R = 0.0821 L.atm.K.mol⁻¹

T = 301K

Volume = 28 ml, or 0.028 liters.

Next, using equation (1)

n = (π × 0.028 L) / (1× 0.0821 L.atmK⁻¹mol⁻¹× 301 K)

Mole = 0.00356 moles.

Given the quantity of samples and that sucralose has a mass of Y g and vitamin C has a mass of X g,

e = 1.371 g

X + Y = 1.371  g

Y = 1.371  g - X ----> (2)

The mass percent of vitamin c is 39.34 % and sucralose is 60.66 % in the sample.

Since vitamin C (VC) has a molecular mass of 176 g/mol while sucralose has a molecular weight of 398 g/mol. The sum of the moles of VC and sucralose is therefore the total amount of moles.

0.00356 moles = X/176 + (1.371 - X)/398

70,048(0.00356) = 398 X + 176(1.371 - X)

249.37 = 398 X +241.296 - 176 x

8.074 = 222x

X = 0.0364 gram (vit c)

Now, using eq (2);

Y =  1.371g - 0.0364 g

Y = 1.3346 gram (sucralose)

Thus, Vitamin C Mass Percentage is equal to 0.0364 g x 100 / 1.371g.

= 2.65%

Sucralose mass % =  1.3346g 100 / 1.371g

= 97.35 %

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10.0 grams of copper sulfate are combined with 10.0 grams of aluminum.
3 CuSO4 + 2 Al --> Al2(SO4)3 + 3 Cu
What is the limiting reactant? (just pick 1 product to convert each reactant to- just make sure the product converted to is the same for both reactants.)

Answers

Answer:

To determine the limiting reactant, we first need to calculate how many moles of each reactant we have. We can use the molar mass of each reactant to convert the given mass to moles.

For copper sulfate:

10.0 g CuSO4 / 159.61 g/mol = 0.0628 moles

For aluminum:

10.0 g Al / 26.98 g/mol = 0.371 moles

Next, we need to use the coefficients from the balanced chemical equation to convert the moles of each reactant to the moles of one of the products. In this case, we will convert the moles of each reactant to moles of Al2(SO4)3.

From the balanced equation:

3 moles CuSO4 = 1 mole Al2(SO4)3

2 moles Al = 1 mole Al2(SO4)3

Therefore, to find the moles of Al2(SO4)3 that can be produced from 0.0628 moles of CuSO4 and 0.371 moles of Al, we divide each value by the respective coefficients from the balanced equation:

0.0628 moles CuSO4 / 3 = 0.0210 moles Al2(SO4)3

0.371 moles Al / 2 = 0.185 moles Al2(SO4)3

Here, 0.185 moles Al2(SO4)3 is the limiting reactant as it is the lowest amount of one of the products that can be formed by converting both reactants. Therefore, the limiting reactant is Aluminum.

write a stepwise mechanism that shows how a very small amount of ch3ch2cl would form during the chlorination of ch4.

Answers

The amount of CH3CH2Cl formed is a function of the amount of CH4 and Cl2 present and can be calculated using the stoichiometric ratios.

Assuming a 1:1 ratio of CH4 and Cl2, a very small amount of CH3CH2Cl will be formed.

1) The chlorination of CH4 begins with the attack of chlorine radicals on the methane molecule, forming a methyl radical and a hydrogen chloride molecule:  CH4 + Cl2 → CH3• + HCl.

2) The methyl radical then reacts with another chlorine radical to form an ethyl radical and a chlorine molecule: CH3• + Cl2 → CH3CH2• + Cl.

3) The ethyl radical then reacts with a chlorine molecule to form an ethyl chloride molecule and a hydrogen atom: CH3CH2• + Cl → CH3CH2Cl + H•.

4) Finally, the hydrogen atom reacts with a chlorine molecule to form another hydrogen chloride molecule and a chlorine atom: H• + Cl2 → HCl + Cl.

Overall, the reaction can be written as: CH4 + Cl2 → CH3CH2Cl + HCl. The amount of CH3CH2Cl formed is a function of the amount of CH4 and Cl2 present and can be calculated using the stoichiometric ratios. Assuming a 1:1 ratio of CH4 and Cl2, a very small amount of CH3CH2Cl will be formed.

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Which of the following statements is FALSE for the chemical equation given below in which nitrogen gas reacts with hydrogen gas to form ammonia gas assuming the reaction goes to completion?
N2 + 3H, = 2NH,
(a). One mole of N, will produce three moles of H2.
(b). The reaction of three moles of hydrogen gas will produce 17 g of ammonia (c). One molecule of nitrogen requires six atoms of hydrogen for complete reaction. (d). The reaction of 14 g of nitrogen produces 17 g of ammonia.

Answers

Answer:

The statement that is false for the chemical equation N2 + 3H2 = 2NH3 is (a). One mole of N2 will produce three moles of H2. In this reaction, one mole of N2 reacts with three moles of H2 to produce 2 moles of NH3. Therefore, one mole of N2 will not produce three moles of H2.

Which of the following is true about the base peak in mass spectrometry?A) The m/z value equals the molecular weight of the compound.B) The m/z value corresponds to a very stable carbanion.C) It has the largest peak height in the spectrum.D) It has the highest m/z value of all the peaks in the spectrum.E) The base peak is assigned a relative abundance equal to that of the parent ion.

Answers

The following is true about the base peak in mass spectrometry - It has the largest peak height in the spectrum. The base peak in mass spectrometry refers to the peak with the largest intensity or peak height in the spectrum.

The intensity of other peaks is stated relative to the base peak, which is the most intense peak in the mass spectrum and is given the value of 100. Most of the time, the molecular ion is responsible for the base peak, which is useful for calculating the compound's molecular weight. The height of each ion in the system can be calculated by comparison. The base peak is a representation of the reaction's most prevalent ion. As a result, it will be the tallest.

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epichlorohydrin is the common name of an industrial chemical used as a component in epoxy cement. the molecular formula of epichlorohydrin is c3h5clo. epichlorohydrin has an epoxide functional group; it does not have a methyl group. write a structural formula for epichlorohydrin.

Answers

The structural formula for epichlorohydrin is shown below:

H

|

C - C - C - O - Cl

Epichlorohydrin is an epoxide and an organochlorine substance. Although it has a halohydrin name, it is not one. It is a white liquid with a strong, garlic-like odour that is miscible with the majority of polar organic solvents but only mildly soluble in water.

Epichlorohydrin (ECH) is a chemical intermediate used in the synthesis of wet-strength resins for paper production, surfactants, synthetic glycerin, epichlorohydrin elastomers, speciality water treatment chemicals, and epoxy resins, which account for roughly 90% of the worldwide market.

After intake or inhalation, epichlorohydrin is quickly absorbed into the body through the skin. The reactive epoxide epichlorohydrin is metabolised by attaching to glutathione and being hydrated by epoxide hydrolase. Both rats and humans have been shown to have the same haemoglobin adduct.

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How many grams are in 1.53 moles of K₂CO3

Answers

211.454 grams of K2CO3 are included in 1.53 moles of K2CO3.

What is moles?

In the International System of Units, the mole (sign mol) is the unit of material quantity. The amount of substance is a measurement of how many elementary entities of a certain substance are present in an object or sample. The mole is defined as having 6.022140761023 basic entities. A mole is a crucial unit of measurement for chemists. A mole of anything equals 602,214,076,000,000,000,000,000 of that item, just as a dozen eggs equals twelve eggs. Chemists must use moles to measure very tiny objects such as atoms, molecules, or other particles.

Here,

1 mole is equal to 1 moles K2CO3, or 138.2055 grams.

grams are in 1.53 moles of K₂CO3,

=211.454 grams

1.53 moles of K₂CO3 contains 211.454 grams of K₂CO3.

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CuSO4+D5H2O is a crystalline compound referred to as a(n) ____.

Answers

CuSO₄+D₅H₂O is a crystalline compound referred to as a(n)  hydrate .

What is a compound with crystals?

A crystalline compound is made up of particles or molecules that are arranged in a particular order to produce an ordered structure. Examples of crystalline compounds include water molecules and ice particles.

What characteristics do crystals possess?

Crystals, also known as crystals, have distinct internal structures that result in distinct faces, or flat surfaces. The angles at which the faces meet are typical of the substance. Each structure also produces a distinctive pattern when exposed to x-rays, which can be used to identify the material.

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provide the structure of the major fragment that results when the molecular ion of ch3ch2ch2ch2oh undergoes fragmentation via alpha cleavage. i ii iii iv v

Answers

When CH₃CH₂CH₂CH₂OH undergoes alpha cleavage (See Pic2), the major fragment produced is CH₃CH₂CH₂CH₂.

The act of disassembling a molecule's molecular structure into smaller parts or fragments is referred to as fragmentation. Chemical processes, collision-induced dissociation, and photodissociation are just a few of the mechanisms that might cause this. By causing molecular ion fragmentation and examining the resultant fragments, fragmentation is a frequently used technique in mass spectrometry to ascertain the structure of a molecule. The distribution and intensity of the fragments can reveal crucial details about the chemistry and make-up of the original molecule.

By eliminating the alpha carbon and the hydrogen that is connected to it, alpha cleavage causes the carbonyl carbon and the beta carbon to establish a new carbon-carbon bond.

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The complete question is:

Provide the structure of the major fragment that results when the molecular ion of ch3ch2ch2ch2oh undergoes fragmentation via alpha cleavage (See Pic1).

1) I

2) II

3) III

4) IV

5) V

During the reaction of CV with NaOH, do you expect the colorimeter absorbance to change? How do you expect it to change if such a change is anticipated (i.e, increase, decrease, stay the same) as the reaction proceeds? Explain

Answers

It is anticipated that as the reaction proceeds the concentration of CV decreases and the absorbance of solution is also expected to decrease.

The reaction between CV (Cyanide) and NaOH (Sodium Hydroxide) will result in the production of NaCN (Sodium Cyanide) and H2O. The colorimeter absorbance of the solution is expected to change as the reaction proceeds. The change in absorbance would depend on the concentration of CV in the solution, and the reaction rate between CV and NaOH.

In general, as the reaction progresses and the concentration of CV decreases, the absorbance of the solution is expected to decrease. The decrease in absorbance would occur because the concentration of the absorbing species (CV) is decreasing, leading to a decrease in the amount of light absorbed by the solution.

It is important to note that the exact change in absorbance would depend on the specific conditions of the reaction, including the initial concentration of CV, the reaction rate, and the wavelength of light used by the colorimeter.

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starting with known concentrations of x and y in experiment 1, the rate of formation of z was measured. if the reaction was first order with respect to x and second order with respect to y, the initial rate of formation of z in experiment 2 would be

Answers

If the reaction is first order with respect to x and second order with respect to y, the rate law can be written as rate = k[X]⁻¹[Y]⁻².

Starting with known concentrations of x and y in experiment 1, the initial rate of formation of z was measured. The initial rate of formation of z in experiment 2 would depend on the new concentrations of x and y. If the new concentrations are different from the initial concentrations used in experiment 1, the initial rate of formation of z in experiment 2 will also be different.

To determine the initial rate of formation of z in experiment 2, the rate law equation would need to be used with the new concentrations of x and y. The units of k, the rate constant, determine the units of the rate.

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--The given question is incomplete, the complete question is

"738; (1,45)(0.042 T Jath) 8518,314(308) 4 OO (3.O0)L85) Ttn (0.0821)(35.0) Enic snele Initial Rate of (Ylo Formation of (moLL- sec 0.101 9l 0.20 Experiment (Xlo 0.40 0.20 The table above shows the results from rate study of the reaction X+Y 2. Starting with known concentrations of X and Y in experiment 1,the rate of formation of Z was measured. If the reaction was first order with respect to( X and second order with respect t0_Y! the initial rate of formation of 2 experiment 2 would be (A) R (B) 2 Cx]" [Y]' 2R Y 1 = 2 1 4R."--

For each atom in the table below, write down the subshell from which an electron would have to be removed to make a + 1 cation, and the subshell to which an electron would have to be added to make a -1 anion The first row has been completed for you. atom subshell from which electron removed to form +1 cation subshell to which electron added to form - anion 11 1 D 0 GE 0 0 5 3 8 6 7 5

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The s subshells are located in the first two columns on the left side of the periodic table. The highest s and p orbitals, known as the valence shells, are where electrons are frequently taken out of molecules.

The s subshells are located in the first two columns on the left side of the periodic table. As a result, the periodic table's first two rows are referred to as the "s block." the columns of the periodic table that are occupied by s subshells. Likewise, the p block The highest s and p orbitals, known as the valence shells, are where electrons are frequently taken out of molecules. The s subshells are located in the first two columns on the left side of the periodic table. As a result, the periodic table's first two rows are referred to as the "s block." the columns of the periodic table that are occupied by s subshells. As with the p block.

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which amino acids have amino groups in their side chains

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There are 3 amino acids having amino groups in their side chains. They are arginine (Arg), lysine (Lys), and histidine (His).

An amino acid is a molecule made composed of a carbon atom called the carbon, a carboxylic acid group, and an amine group. The R group, a particular side chain, is also joined to the carbon in each of the 20 amino acids.

Three amino acids have basic side chains when the pH is neutral. These are histidine, lysine, and arginine (Arg) (His). Their side chains are nitrogen-containing and mimic basic ammonia. Because of their high pKa values, they have the propensity to bind protons and acquire a positive charge as a result.

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What volume of 0.0500 mol/L Kmn04 (aq) is needed to oxidize all the Br (aq) ions in 25.0 mL of an acidic 0.200 mol/L NaBr (aq) solution according to the following unbalanced equation. (Ans: V = 20. OmL) MnO4 (aq) + Br(aq) + Br2 (aq) + Mn2+ (aq)

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The volume of 0.0500 mol/L Kmn04 required is 0.00083 / 0.0500 = 0.0167 L = 16.7 mL, rounded to 20.0 mL.

To balance the equation, we need to add 5 electrons to the right side to match the electrons on the left side:

MnO4^- + 8H^+ + 5e^- -> Mn^2+ + 4H2O

Br^- + 2H^+ + 1e^- -> Br2 + H2O

Adding the two reactions together, we get:

MnO4^- + 8H^+ + 5e^- + Br^- + 2H^+ + 1e^- -> Mn^2+ + 4H2O + Br2 + H2O

This reaction requires 6 electrons in total, which means that 6 moles of Br^- will be oxidized by 1 mole of MnO4^-.

Since the concentration of NaBr is 0.200 mol/L, there are 0.200 x 25.0 mL / 1000 mL = 0.005 mol of Br^- in the solution.

To oxidize all the Br^-, we need 0.005 / 6 = 0.00083 moles of MnO4^-

So the volume of 0.0500 mol/L Kmn04 required is 0.00083 / 0.0500 = 0.0167 L = 16.7 mL, rounded to 20.0 mL.

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2. by diluting acids of high concentration, are you decreasing the h (aq) ion concentration or the number of moles of h (aq) ion? explain your choice.(3 pts)

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Decreasing the H(aq) ions concentration results in dilution of acids.

If a solution has higher concentration of H+ ions it is more acidic in nature. A given solution of an acid is diluted by adding more water. Thus, the overall volume of the solution increases.

The concentration of hydronium ions decreases when an acid is diluted because on adding water the H+ ions of the acid and hydroxyl ions of water react to form water molecules and the concentration of hydronium ions decreases.

Therefore, the number of hydrogen ions per unit volume decreases and hence the concentration of hydrogen ions decreases.

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why chromium acetate is diamagnetic

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Chromium acetate is diamagnetic because it does not have any unpaired electrons in its orbitals, which are required for magnetic behavior.

Diamagnetic materials are materials that are not attracted to magnetic fields, and they behave in a manner that is opposite to magnetic materials, known as paramagnetic materials.

Chromium acetate has a complete electron shell configuration with all electrons paired, which means that the electrons are paired in the orbitals, and there is no net magnetic moment.

As a result, chromium acetate does not exhibit any magnetic properties and is considered to be diamagnetic.

The diamagnetic behavior of chromium acetate can be explained by the principles of quantum mechanics and the orbital configuration of the atoms in the molecule.

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A scientist wants to develop a new chemical. In one or two sentences, create a science question and a non-science question that the scientist could consider when developing the new chemical.

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Pose an inquiry.Create an explanation that can be tested.In light of the theory, make a forecast.Formal sciences: the investigation of a priori, as opposed to empirical, systems, such as those found in the fields of logic and mathematics.

What three things must scientists accomplish in order to conduct an experiment? Pose an inquiry.Create an explanation that can be tested.In light of the theory, make a forecast.Formal sciences: the investigation of a priori, as opposed to empirical, systems, such as those found in the fields of logic and mathematics.The study of natural phenomena in the natural sciences (including cosmological, geological, physical, chemical, and biological factors of the universe). An observation triggers an inquiry from the scientist, who then formulates a hypothesis using the scientific method.After that, they formulate a hypothesis—a tested theory—that responds to the query.For instance, grass seeds will develop more quickly if I grow them under green light bulbs than red light bulbs, for example.

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the enthalpy of formation of vacancies in pure copper is dh 1⁄4 86.9 kj mol1. what is the fraction of sites vacant at 1084 c?

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The fraction of sites vacant at 1084 c is 4.55 x 10⁻⁴

Crystals are naturally imperfect, which is referred to as cystallographic defects. Point defects describe the imperfections of solids as well as the different types of point defects. A type of point defect is Stoichiometric defect and a type of Stoichiometric defect is a vacancy defect. A vacancy is a type of point defect in crystallography in which an atom is missing from one of the lattice sites. This results in a decrease in the crystal's density.

Temperature (T) in kelvin = 1084+273 = 1357K

Energy for vacancy formation (Qv) = 86.9 kj/mol = 0.9 eV

Boltzmann constant(k) = 8.62 x 10⁻⁵ eV/atom-K

For a fraction of atoms, formula : Nv/N = exp(-Qv/kT)

Nv/N = exp (-0.9/ 8.62 x 10⁻⁵ x 1357)

Hence, Nv/N (fraction of sites vacant) = 4.55 x 10⁻⁴

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Describe the delocalization of pi (π) electrons and explain how this can account for the structure and stability of the carbonate ion, CO32-

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Delocalization of pi (π) electrons refers to the spreading of electrons over a larger region than would be expected in a localized bond. The carbonate ion, CO32-, exhibits delocalization of its pi electrons, which can account for its structure and stability.

In the carbonate ion, the three oxygen atoms are bonded to the central carbon atom in a planar arrangement. The double bonds between the carbon and oxygen atoms consist of both sigma (σ) and pi (π) bonds. The pi electrons are delocalized over the three oxygen atoms, resulting in the formation of a resonating structure.

This delocalization of pi electrons contributes to the stability of the carbonate ion by reducing the repulsive forces between the negatively charged oxygen atoms. The delocalization of the pi electrons spreads the negative charge over a larger region, reducing the strength of the repulsive forces between the oxygen atoms and allowing the carbonate ion to maintain its planar structure.

In addition, the delocalization of the pi electrons increases the electron density around the central carbon atom, making it more difficult for the carbonate ion to react with other species and increasing its stability.

In summary, the delocalization of pi electrons in the carbonate ion, CO32-, contributes to its stability by reducing the repulsive forces between the negatively charged oxygen atoms and increasing the electron density around the central carbon atom. This delocalization of pi electrons plays a key role in determining the structure and stability of the carbonate ion.

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Assume you have a mixture that is 20% acetone, 45% cyclohexane, and 35% dimethyl carbonate. Match the chemical shifts to the compounds.Group of answer choicesAcetone[ Choose ] 7.2 ppm 3.8 ppm 0 ppm 2.2 ppm 1.4 ppmCyclohexane[ Choose ] 7.2 ppm 3.8 ppm 0 ppm 2.2 ppm 1.4 ppmDimethyl carbonate[ Choose ] 7.2 ppm 3.8 ppm 0 ppm 2.2 ppm 1.4 ppmContinue analyzing this 20% acetone, 45% cyclohexane, and 35% dimethyl carbonate mixture. If the acetone peak is set to an integration of exactly 1, then what will the integration be for the dimethyl carbonate peak?

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The chemical shift in nuclear magnetic resonance (NMR) spectroscopy refers to the atomic nucleus' resonant frequency in relation to a standard in a magnetic field.  Thus, option A is correct.

What are the chemical shifts to the compounds?

Today, the emphasis will be on particular chemical shift areas that are typical of the most prevalent functional groups in organic chemistry.

The primary areas of the 1 H NMR spectrum and the ppm values for protons in various functional groups are listed below: The units are expressed in parts per million, and the energy axis is known as a (delta) axis (ppm).

Indeed, they depend on the orientation of the molecule with regard to the external magnetic field because they have three major values along orthogonal axes.

Therefore, The location and quantity of chemical changes frequently serve as diagnostic indicators of molecular structure.

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The chemical shift in nuclear magnetic resonance (NMR) spectroscopy refers to the atomic nucleus' resonant frequency in relation to a standard in a magnetic field. Thus, option A is correct.

What are the chemical shifts to the compounds?

Today, the emphasis will be on particular chemical shift areas that are typical of the most prevalent functional groups in organic chemistry.

The primary areas of the 1 H NMR spectrum and the ppm values for protons in various functional groups are listed below: The units are expressed in parts per million, and the energy axis is known as a (delta) axis (ppm).

Indeed, they depend on the orientation of the molecule with regard to the external magnetic field because they have three major values along orthogonal axes.

Therefore, The location and quantity of chemical changes frequently serve as diagnostic indicators of molecular structure.

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4. can the carbon dioxide content of wastewater sample known to contain significant concentrations of acetic acid be determined by the titration procedure? why?

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A wastewater sample that is known to contain high amounts of acetic acid can be utilised to determine the carbon dioxide content using the titration process.

Water and some of the CO2 that is dissolved in it react to create carbonic acid (H2CO3). The pH of the water decreases as a result of the hydrogen ions in carbonic acid. Therefore, when the blood's carbon dioxide concentration increases, more H+ ions and a lower pH are created. Numerous titrations are required to boil the solution due to the CO2 that is created during the acid-base interaction. Carbonic acid (H2CO3) is created when carbon dioxide is dissolved in water; this acid acts as a buffer and reduces the accuracy of data.

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4.
In pea plant, the tall(T) trait i domiant over the dwarf (t) trait. A homozygous tall plant is crossed with homozygous dwarf plant . What are the genotype and phenotypes of the first generation? Assume complete domiance. helppp meee

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Answer:

According to the law of dominance, a trait is represented by two contrasting factors of a gene in a heterozygous individual; the allele/factor that can express itself in the heterozygous individual is called as a dominant trait. The other factor whose effect is masked by the presence of the dominant factor is called recessive factor. Thus, a cross between pure breeding tall (TT) and dwarf (tt) pea plants will obtain all hybrid tall (Tt) offspring in F1 generation. According to the law of segregation, the two factors for a trait, present together in heterozygous tall plants, do not get mixed and are separated during gametogenesis. Thus each gamete receives one allele for a trait and two types of gametes are formed, 50% gametes carry factor for dominance (T) and 50% carry the recessive factor (t). Random fusion of these gametes from two-hybrid tall plants produces tall and dwarf F2 plants in a 3:1 ratio.

in a first-order decomposition reaction, 50.0% of a compound decomposes in 19.0 min. (a) what is the rate constant of the reaction? (round to four decimal places)

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The rate constant of the reaction is [tex]0.0369 min^{-1}[/tex], where 50.0% of a compound decomposes in 19.0 min.

In a first-order decomposition reaction, the rate of reaction is proportional to the concentration of the reactant. The rate constant, k, describes the rate of the reaction and is related to the half-life of the reaction, t1/2, by the equation:

t1/2 = 0.693/k.

In this case, since 50.0% of the compound decomposes in 19.0 min, the half-life of the reaction can be calculated as follows:

t1/2 = 19.0 min * (1 - 0.50)^(1/2) = 13.5 min.

The rate constant can then be calculated using the equation:

k = 0.693/t1/2 = [tex]0.0369 min^{-1}[/tex].

This value of k can be used to predict the rate of reaction at any time during the decomposition, as well as to compare the rate of the reaction to other first-order decomposition reactions.

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