Then 2520 ounces of solution z contains ounces of a is 876 ounces.
given that ;
x contains a and b in the ratio = 2:3
y contains a and b in the ratio = 1:2
z contains the a and b in the ratio 3:11, that, means in 14 parts of solution.
therefore, 2520 ounces solution of z,
x = ( 2520 × 3 ) / 14 = 540
y = ( 2520 × 11 ) / 14 = 1980
x = 540 (2/5) = 216
y = 1980 / 3 = 660
thus, One ounce of solution x contains only ingredients a and b in a ratio of 2:3. One ounce of solution y contains only ingredients a and b in a ratio of 1:2. If solution z is created by mixing solutions x and y in a ratio of 3:11, then 2520 the ounces of solution of z = 876
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Can dew point be measured in Fahrenheit?.
Yes, dew point can be measured in Fahrenheit. Dew point temperature is the measure of atmospheric moisture.
The dew factor is the temperature the air desires to be cooled to (at regular stress) in order to achieve a relative humidity (RH) of one hundred%. At this point, the air can't maintain greater water inside the fuel shape.
In other words, it enables meteorologists to discern out the amount of moisture inside the air. Once the dewpoint reaches the air temperature, the air can't keep any greater water vapor. it's at this point that fog, dew, or any kind of precipitation may additionally form.
The dew factor is laid low with humidity. when there may be more moisture within the air, the dew point is higher.
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draw the electron dot structure of the scl2 molecule, and then use vsepr theory to draw a model that shows the shape of the molecule and its polarity. the electronegativity difference between s and cl is 0.5
When left at room temperature, Sulphur dichloride is a viscous crimson liquid. It smells strong, almost like chlorine. Acids containing chlorine are created when it combines with water.
It is extremely poisonous and corrosive to use Sulphur dichloride. Because S and Cl have negligible differences in electronegativity, it is a covalent molecule. They are both non-metals. chlorine is in the -1 oxidation state while S is in the +2 oxidation state. In addition to carbon tetrachloride, it is soluble in hexane and benzene.
Dots are used in this method to represent the electrons in the valence shell; two dots on dissimilar elements can be connected to form a bond. The octet rule and formal charges should be satisfied by the final Lewis structure of Sulphur dichloride. Another Lewis structure is drawn if it doesn't fulfil either of them.
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An ammonium nitrate product dissolves easily in water at room temperature, and the process causes the solution to become quite cold. Which of the following are true about the dissolution of ammonium nitrate?
I. The process is endothermic.
II. The solubility will be greater in warmer water.
III. So for the reaction is negative.
The dissolution of ammonium nitrate is an endothermic process and The solubility will be greater in warmer water.
Temperature is a bodily quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured by using a thermometer. Thermometers are calibrated in diverse temperature scales that historically have trusted various reference points and thermometric materials for definition.
Temperature plays a vital role in hospital treatment (each people and animal), food, drinks, and agriculture. Our typical health is often reliant upon the temperature in many methods as properly. Preserving the right temperature degrees in medical cold garage areas is crucial.
The SI unit of temperature as in line with the international machine of units is Kelvin that's represented by the symbol K.
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which of the following solutions contains molecules that absorb the highest energy light? note that the colors listed are the colors that are observed for the solutions, not the colors that are absorbed.
The solutions that contains molecules that absorb the highest energy light is purple colour solution.
What determines the amount of light energy a color absorbs?The amount of light energy a colour absorbs determines the amount of heat energy that light can be converted into. For example, the color violet contains more energy than red. That means violet absorbs more light, making it a warmer color than red.
dark colors absorb more light energy, they absorb a lot more heat than brighter hues. In fact, the closer a hue gets to dark, the more heat it absorbs from light sources. Because black clothing reflects little solar light, it also reflects less solar heat, making it hotter. The same thing happens with any color as it approaches black - the darker the hue, the more heat it will absorb.
This is why dark clothes are better for winter and bright clothes are better for summer - when you wear dark colors, you're protecting yourself from the cold in winter and the hot of the sun in summer.
And this is why people who work outside often wear colored gloves - dark colors block out heat, while bright colors block out cold.
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what are the steps in the correct order in a single pcr (polymerase chain reaction) cycle? i. elongation ii. annealing iii. amplification iv. denaturation v. extension
The correct order in a single PCR cycle would be denaturation, annealing, elongation, and amplification. IV, II, I, and III.
What is PCR?PCR is an acronym for Polymerase Chain Reactions. It is mechanisms through which scientists are able to amply, sometimes to a tune of millions or billions, a DNA of interest for detailed study.
The process of Polymerase Chain reaction occurs through alternate heating and cooling using a thermal cycler machine. It occurs through a series of steps which are highlighted below:
First, the DNA that contains the gene of interest is first denatured to separate the double-stranded structure into single strands.Next, a primer which is a short artificial DNA of a few nucleotide bases is made to anneal with its complementary bases on the denatured DNA that contains the gene of interest. Then, the primer is further extended by the addition of nucleotide bases that are complementary to the sequence of the gene of interest.Lastly, the process is repeated several times to synthesize multiple copies of the gene of interest.Thus, the right sequence of a PCR cycle would be denaturation, annealing, elongation, and amplification.
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What are the products of combustion of hydrocarbons and water?.
Water and carbon dioxide are the byproducts of hydrocarbon burning.
What are some examples of hydrocarbons?A mixture of hydrocarbon is called a hydrocarbon. The hydrocarbons methane (CH4), ethane (C2H6), and ethyne are examples of (C2H2). These compounds are all hydrocarbons since their corresponding molecular formulas show that they are all solely composed of the elements hydrogen and carbon.
The biggest hydrocarbon is?The biggest and most intricate carbon molecules are found in coal. Various hydrocarbons produce different amounts of water and carbon dioxide because their hydrogen to carbon ratios vary. The ratio of charcoal to hydrogen is typically higher in longer, more complicated molecules.
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If a certain dose of radiation produce a skin burn, a higher dose of radiation will cause the skin burn to be more severe; however, a dose below the threshold level for skin burn will
a. demonstrate this effect to a much greater degree
b. demonstrate this effect to moderate degree
c. demonstrate this effect to a lesser degree
d. not demonstrate the effect
If a certain dose of radiation produce a skin burn, a higher dose of radiation will cause the skin burn to be more severe; however, a dose below the threshold level for skin burn will not demonstrate the effect.
The radiation is also known as the electromagnetic radiation. The energy that emittance from the source and travel thorough space at speed is called as radiations. A dose below the threshold level for the skin burn will not demonstrate the effect.
Thus, If a certain dose of radiation produce a skin burn, a higher dose of radiation will cause the skin burn to be more severe; however, a dose below the threshold level for skin burn will not demonstrate the effect.
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both copper (atomic number 29) and chromium (atomic number 24) appear to break the pattern in the order of filling the 3d and 4s orbitals. this change in pattern is expressed by
A decrease in the amount of electrons in the 4s orbital and an increase in the 3d orbital are indicators of the pattern alteration.
THE ORDER OF FILLING 3d AND 4s ORBITALS: -
You may easily determine the electrical structures of elements by using the method that is typically taught when explaining the sequence in which orbitals are filled. However, it does provide issues when attempting to describe various transition element features.
The order of filling orbitals: -
Prior to filling higher energy orbitals, electrons first fill low energy orbitals that are closer to the nucleus. When given the option between two orbitals with the same energy, they fill the orbitals singly as much as they can.
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ruthenium (ru) has an abnormal electron configuration that causes ru to form ru 1, ru 3, and ru 7 ions. please draw the noble gas electron configuration of ru and explain why it forms those ions.
As can be seen from the periodic chart, silver and ruthenium are classified as belonging to the same period, the fifth period. Rutanium has an atomic number of 44, whereas silver has an atomic number of 47.
What is Ruthenium ?Ru Its atomic number 44 identify the chemical element ruthenium. It is an uncommon transition metal from the periodic table's platinum group. Rutanium is inert to the majority of other compounds, just like the other platinum group metals.
Solar cells, which convert light energy into electrical energy, can use ruthenium molecules. One of the best hardeners for platinum and palladium is ruthenium, which is alloyed with these metals to provide electrical connections with extremely high wear resistance. In certain jewelry, it is combined with platinum as an alloy.
What is Electron configuration ?The arrangement of an atom's or molecule's electrons in atomic or molecular orbitals is known as the electron configuration in atomic physics and quantum chemistry.
Divide the periodic table into pieces to represent the atomic orbitals, the areas where electrons are stored, in order to determine an electron configuration. The s-block is represented by groups one and two, the d-block by groups three through twelve, the p-block by groups thirteen to eighteen, and the f-block by the bottom two rows.
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How do you control chemical exposure in the workplace?.
By changing process to minimize contact with hazardous chemicals. And Isolating or enclosing the process etc. We can control chemical exposure in the workplace.
Controlling exposures to chemical hazards and toxic substances is the fundamental method of protecting workers. A hierarchy of controls method is used as a means of determining how to implement feasible and effective controls.
The method use to control can be-
Change process to minimize contact with hazardous chemicals.
Isolate or enclose the process.
Use of wet methods to reduce generation of dusts or other particulates.
General dilution ventilation.
Use fume hoods.
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a 20.0 ml solution of naoh is neutralized with 29.3 ml of 0.200 m hbr. what is the concentration of the original naoh solution?
The concentration of the original naoh solution is 0.325M NaOH.
What is solution?Solution is something where we mixed up two objects.
First, find the number of mols of HBr used for the neutralization by multiplying the concentration of HBr by the volume of HBr (in liters)...
0.200M * 0.0325L = 6.5E-3 mol HBr
since the reaction between HBr and NaOH is one-to-one, you know that there must have been 6.5E-3 mol NaOH in the basic 20.0mL solution, so to get concentration, and divide the moles of base by the volume of the base (in liters) and you get...
6.5E-3mol/0.0200L = 0.325M NaOH
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Identify the compound that does not have dipole-dipole forces as its strongest force.
Dipole-dipole forces are not the greatest force [tex]CO_{2}[/tex] from the examples given. While the largest forces in the other compounds, such as [tex]CH_{2}Br_{2}[/tex], [tex]CH_{3}Br[/tex], [tex]CHCl_{3}[/tex], and [tex]CH_{3}OCH_{3}[/tex], are dipole-dipole forces.
Despite having polar connections between its center carbon atom and two oxygen atoms, [tex]CO_{2}[/tex] is a non-polar molecule. There are only London dispersion forces since the dipoles are pointing in opposite directions and cancel each other out.
There is an electronegative difference between the carbon atom and the halogen atom in the compound [tex]CH_{2}Br_{2}[/tex], [tex]CH_{3}Br[/tex], and [tex]CHCl_{3}[/tex] . As a result, these compounds, which are also polar, include dipole-dipole forces. The dipole-dipole and London dispersion forces are both present in the compound [tex]CH_{2}Br_{2}[/tex].
Dimethyl ether is [tex]CH_{3}OCH_{3}[/tex]. In methoxy methane (or dimethyl ether), the carbon and oxygen linkages are polar. Its geometry is angular. This molecule exhibits the London dispersion and dipole-dipole forces.
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how many moles of carbon dioxide would have to be added at constant temperature and volume to increase the amount of carbon monoxide to 0.3000.300 mol once equilibrium has been reestablished?
Once equilibrium has been restored, 0.300 mol of carbon monoxide would be produced by adding 1.302 moles of carbon dioxide at a constant temperature and volume.
What are carbon monoxide's four symptoms?Headache, dizziness, weakness, nausea, upset tummy, vomiting, chest discomfort, and confusion are the most typical signs of CO poisoning. The most common symptoms of modest carbon monoxide exposure are headaches, tiredness, and nausea. Unfortunately, because the symptoms frequently resemble the flu, they are readily missed.
What symptoms of carbon monoxide are there?The most common symptoms of CO poisoning include headache, dizziness, exhaustion, nausea, vomiting, tightness in the chest, and disorientation. Before showing any symptoms, CO poisoning can kill those who are asleep or who have consumed alcohol.
Briefing:Reaction :CO +H₂O ⇔ CO₂ + H₂
initially 0.2 0.2 0.75+x 0.75
reaction 0.1 0.1 0.1 0.1
product 0.3 0.3 0.65+x 0.65
Kc=(0.650+x) (0.65)/0.3*0.3
14.1(0.09)=0.4225+0.65x
1.269 - 0.4225 = 0.65x
0.8465 = 0.65x
x=1.302
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ow many geometric isomers are possible for [co(en)(nh3)2(h2o)cl] ? how many of those geometrical isomers are chiral? (meaning that each has a non-superimposable mirror image)?
[co(en)(nh3)2(h2o)cl] has a possible four geometric isomers. Unless they also have chiral centers, geometric isomers are typically not optical isomers.
What is an example of an isomer?Isomers are substances that have the exactly the same amount of protons as one another, meaning they have the exact same equations, but differ from one another in terms of how the atoms are ordered. Ethylbenzene, m-xylene, p-xylene, or o-xylene are some examples of isomers having the formula C8H10.
What makes it an isomer?Are referred to as isomers if they have the same chemical formula but different characteristics and atom arrangements. Isomers are chemicals that exhibit isomerism as a result. The Greek words "isos" and "meros," which mean "equal pieces," are the source of the English word "isomer."
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some invertebrates combine morphological simplicity with features of great structural or biochemical complexity. select all correct examples of this statement.
Atoms strive for a helium nucleus electron configuration, which consists of eight valence electrons, in accordance with the octet rule.
Simply put, what does biochemical mean?The research of chemical reactions that take place both in and out of living organisms is known as biochemistry. It is a research facility science that combines chemistry and biology. Biochemists can understand and address biological issues by utilizing their understanding of and proficiency with chemical processes.
What's an example of biochemistry?One such biological molecule is glucose. The Greek word for "life" is where the word bio- comes from. Any carbon-based substance found in living beings is referred to as a biochemical compound. The cells in the body of all living organisms are composed of biochemical substances.
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which compound in each pair has the higher melting point? choose the correct symbol: greater than (>) or less than (<). a. ch4 (select) c2h6 b. c2h6 (select) ch3oh c. hbr (select) hcl d. c2h6 (select) ch3br
Her c2h6 has a greater melting point than ch4, ch3oh, and ch2br because the melting point typically increases with the length of the carbon chain. Hcl has a higher melting point than Hbr.
A substance's temperature at which it transforms from a solid to a liquid is known as its melting point (or, less frequently, liquefaction point). The equilibrium between the solid and liquid phases exists at the melting point. A substance's melting point is dependent on pressure and is often reported at a reference pressure, such as 1 atmosphere. Due to the distinctive qualities it possesses, carbon chain is known to produce a variety of compounds. Methane is the universal or fundamental carbon chain-based molecule (CH4).
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Sulfuric acid decomposes into sulfur trioxide gas and water. What would be the respective coefficients for balancing?.
Chemical equations must be balanced, which requires that the quantity and type of atoms on both sides of the reaction arrow be equal.
What are the balanced reaction's coefficients?As a result, chemical equations must be balanced, which requires that the quantity and type of atoms on both sides of the reaction arrow be equal. Coefficients are the values added in front of formulas to balance equations; they multiply each atom in a formula.The number in front of the variable phrases is the coefficient, just like in algebra. The number in front of the formula is the coefficient in chemistry.
Sulphur trioxide = SO_3
Sulfuric acid = H_2SO_4
SO 3(g) + H2O (l) ---> H2SO4 (aq)
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when 15.1 g of al reacts with 17.7 g of oxygen gas, how many grams of al2o3 (101.96 g/mol) are predicted to form? report your answer to the tenths place and do not include units.
[tex]2Al+ 1.5O_2 \to Al_2O_3\\2Al= 2×27=54 \\g .[/tex]
Hence, the weight of Al used in the chemical reaction is 54 g.
What is a chemical reaction?
chemical reaction, the transformation of one or more chemicals (the reactants) into one or more distinct compounds (the products). Chemical elements or chemical compounds make up substances. In a chemical reaction, the atoms that make up the reactants are rearranged to produce various products.Chemical reactions are a fundamental component of life itself, as well as technology and culture. Burning fuels, smelting iron, creating glass and pottery, brewing beer, making wine, and making cheese are just a few examples of ancient processes that involved chemical reactions.To know more about chemical reactions, click the link given below:
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A house is cooled by an air conditioning system on a hot day. Using the house as a system, describe the transfer of energy between the system and surroundings
Heat is transferred from the system to the surroundings in this case.
What is the energy transfer?We know from the first law of thermodynamics that energy can neither be created nor destroyed but has to be transformed from one form to another. In this case we can see that energy is transferred from the surroundings to the system.
Now, given the fact that air molecules that are around the house is warm and of less density so they would rise to the surface and then when they get to the surface they would interfaced with the cool air from the air conditioning system which is heading downward.
Thus we can see that the warm air from the room is going upwards while the cool air from the air conditioning system is going downwards thus a convection current is set up.
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an rna primer is created by enzyme which then supplies the (3 or 5)' hydroxyl group used by to start adding dna nucleotides.
An enzyme called primase,3 which produces a rna primer, provides that (3 or 5)' hydroxy group needed to begin adding DNA nucleotides.
What use do hydroxyls serve?A functional group named a hydroxyl binds to some compounds that have a hydrogen and oxygen atom bound together. This functional group, which is also written hydroxy, plays crucial roles in the actions of both alcohols and organic acids.
Is OH an alcohol or a hydroxyl?A substance classified as an alcohol has an aliphatic side atom attached to a hydroxyl (OH) substituent. Since OH serves as all alcohols' functional group, we frequently refer to alcohols by their generic formula Rh, whereby R is an alkyl. In nature, alcohols are widespread.
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What do you expect to see in a test tube when several drops of two aqueous solutions are mixed, and an insoluble precipitate is formed?.
When we mix several drops of two aqueous solutions and an insoluble precipitate is formed then we may expect to see a cloudy appearance.
In performing chemical reactions when some quantity of two solutions are mixed together and formation of a solid form of residue takes place beneath the liquid, then such reactions are known as precipitation reactions. In double displacement reaction between two different solutions, the insoluble salts separates out to form precipitate. For example in the reaction between sodium hydroxide and copper sulphate, copper hydroxide gives a pale blue precipitate.
2NaOH(aq) + CuSO₄(aq) → Cu(OH)₂ (s) + Na₂SO₄ (aq)
pale blue ppt
Hence, these insoluble precipitates gives a cloudy appearance to the solution. They are mostly coloured or white.
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ASAP!
For the reaction below calculate how many grams of M3N7 are needed to produce 3 g of Sn3N4
4 Mn3N7 + 21 Sn(504)2 ---> 6 Mn2(504)7 + 7 Sn3N4
Taking into account the reaction stoichiometry, a mass of 1.092 grams of Mn₃N₇ is needed to produce 3 g of Sn₃N₄.
Reaction stoichiometryIn first place, the balanced reaction is:
4 Mn₃N₇ + 21 Sn(SO₄)₂ → 6 Mn₂(SO₄)₇ + 7 Sn₃N₄
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Mn₃N₇: 4 molesSn(SO₄)₂: 21 molesMn₂(SO₄)₇: 6 molesSn₃N₄: 7 molesThe molar mass of the compounds is:
Mn₃N₇: 263 g/moleSn(SO₄)₂: 311 g/moleMn₂(SO₄)₇: 782 g/moleSn₃N₄: 413 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Mn₃N₇: 4 moles ×263 g/mole= 1052 gramsSn(SO₄)₂: 21 moles ×311 g/mole= 6531 gramsMn₂(SO₄)₇: 6 moles ×782 g/mole= 4692 gramsSn₃N₄: 7 moles ×413 g/mole= 2891 gramsMass of Mn₃N₇ requiredThe following rule of three can be applied: If by reaction stoichiometry 2891 grams of Sn₃N₄ are produced by 1052 grams of Mn₃N₇, 3 grams of Sn₃N₄ are produced by how much mass of Mn₃N₇?
mass of Mn₃N₇= (3 grams of Sn₃N₄× 1052 grams of Mn₃N₇)÷ 2891 grams of Sn₃N₄
mass of Mn₃N₇= 1.092 grams
Finally, a mass of 1.092 grams of Mn₃N₇ is needed.
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what is the ph of a solution prepared by mixing 50.00 ml of 0.10 m methylamine, ch3nh2, with 5.00 ml of 0.10 m methylammonium chloride, ch3nh3cl? assume that the volume of the solutions are additive and that k b
The pH of the solution prepared by mixing 50.00 ml of 0.10 m methylamine, CH₃NH₂, with 5.00 ml of 0.10 m methyl ammonium chloride, CH₃NH₃Cl is 11.568
It is given that the volume of methylamine to be prepared is 50ml with a concentration of 0.1M. To find the pH the following formula is used,
PKb = -log(Kb)
It is given that the value of Kb is 3.70 x 10^-4 for methylamine. Therefore on substituting we get,
PKb = -log(3.7x10^-4)
PKb = 3.432
Then,
POH = PKb + log(moles of CH₃NH₃Cl/moles of CH₃NH₂).........(1)
Also, we know that,
Molarity = n/v
Moles of CH₃NH₃Cl = Molarity x Volume
Moles of CH₃NH₃Cl = 0.1 x 5
Moles of CH₃NH₃Cl = 0.5
Moles of CH₃NH₂ = 50 x 0.1
Moles of CH₃NH₂ = 5mol
Substituting these values in (1) we get,
POH = 3.42 + log(0.5/5)
POH = 2.432
Therefore,
pH = 14 - POH
pH = 14 - 2.432
pH = 11.568
Therefore the pH of the solution is 11.568.
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the compound sodium bromide is a strong electrolyte. write the reaction when solid sodium bromide is put into water.
When solid sodium bromide is added to water, the reaction is
NaI(s) → Na⁺(aq) + I⁻(aq)
What is meant by electrolyte?A medium that contains ions and conducts electricity due to the movement of those ions but not due to the movement of electrons is called an electrolyte. Most soluble salts, acids, and bases that have been dissolved in a polar solvent, like water, fall under this category. When dissolved in water, electrolytes are materials that have a natural electrical charge that is either positive or negative. In addition to other things, they support your body's ability to control chemical processes and keep the fluid levels inside and outside of your cells in equilibrium. Minerals with an electric charge called electrolytes are found in your blood and other bodily fluids. Numerous factors, such as: The body's water content, are impacted by electrolytes on how it functions. Your blood's acidity (pH) The action of your muscles.The chemical formula of sodium iodide is NaI. When NaI is dissolved in water, it dissociates into sodium ions (Na⁺) and iodide ions (I⁻). One mol of NaI gives 1 mol of Na⁺ ions and 1 mol of I⁻ ions.
Therefore, the chemical equation for the dissociation is the following:
NaI(s) → Na⁺(aq) + I⁻(aq)
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a buffer solution is formed by mixing equal volumes of 0.12mnh3(aq) and 0.10mhcl(aq), which reduces the concentration of both solutions by one half. based on the pka data given in the table, which of the following gives the ph of the buffer solution?
A two-fold dilution lowers a solution's concentration by a factor of 2, or by half of the initial concentration.
What is the solution described?In chemistry, a solution is a homogeneous mixture comprising two or more compounds in their relative proportions. The composition of the solution can be continually changed up to the solubility limit. Although solutions of gases or solids are possible, the term "solution" is most frequently used to refer to the liquid condition of matter.
A solution example is what?A solution is a homogeneous mixture of substances having particles less than one nanometer in size. Solutions come in a wide variety of forms, including seltzer water, sodium chloride treatments, and others.
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Write the net ionic equation for the following molecular equation. 3CuCl2 (aq) + 2Na3PO4(aq) + Cu3(PO4)2 (s) + 6NaCl(aq) (Use the lowest possible coefficients. Be sure to to specify states such as (aq) or (s). If a box is not needed, leave it blank.) + + The following molecular equation represents the reaction that occurs when aqueous solutions of silver(I) nitrate and iron(III) chloride are combined. 3AgNO3(aq) + FeCl3 (aq) + 3AgCl(s) + Fe(NO3)3 (aq) Write the balanced net ionic equation for the reaction. (Use the lowest possible coefficients. Be sure to to specify states such as (aq) or (s). If a box is not needed, leave it blank.) + + Write the net ionic equation for the following molecular equation. HBr is a strong electrolyte. HCIO is a weak electrolyte. KCIO(aq) + HBr(aq) → KBr(aq) + HCIO(aq) (Use the lowest possible coefficients. Be sure to to specify states such as (aq) or (s). If a box is not needed, leave it blank.)
The net ionic equation for the following molecular equation. 3Cu2+ (aq) + 2PO4-three (aq) ==> Cu(PO4)2 (s) 2. 3Ag+ (aq) + 3Cl- (aq) ==> three AgCl 3.
Step 1: Write the overall ionic equation wherein compounds in aqueous kingdom are ionized into their ionic components. The insoluble stable isn't ionized because it isn't in an aqueous kingdom.
Step 2: The spectator ions that seem on each aspects of the equation are cancelled out to offer the net ionic equation.
In essentially 3 ways: components equation, complete ionic equation, and net ionic equation. For a precipitation reaction, the net ionic equation indicates simplest the ones species that extrade from the reactant facet to the product facet. Those that don't extrade are referred to as spectator ions or species and are not noted from the net ionic equation.
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Calculate the change in heat when 10.00 g of water vapor (steam) at 100.0°c condenses to liquid water and then cools to 10.00 °c
The change in heat when 10g of water vapor at 100 degree celcius condenses to liquid water and then cools to 10 degree celcius is 26.38KJ
What is heat?It is a transfer of a kinetic energy from one substance or object into another substance or object, or from an energy source to a medium or object. Such energy transfer can occur in three ways : radiation, conduction, convection.
Here, we want to calculate how much heat that's been released from the water vapor (steam) at 100 degree celcius, condenses to liquid water, and then cools down into 10 degree celcius.
Q = Q1 + Q2
Q1 = steam condensation takes place at 100 degree celcius.
Q2 = water cools down into 10 degree celcius
Q1 = m. Lv
Lv = latent heat of vaporization of water = 2260 J/g (standard)
m = mass of steam = 10g
Q1 = 10 * 2260 J/g = 22600 J
Specific heat of water = 4.2 J/g.K
ΔT = T final - Tcools down = (100 + 273) - (10 + 273) = 90 Kelvin
Q2 = m*c*ΔT
= 10 * 4.2 * 90
= 3,780 J
Q = Q1 + Q2
= 22,600 + 3,780
Q = 26,380J
1 J = 10^-3KJ
Q = 26.38KJ
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determine delta h vap for a compound that has a measured vapor pressure of 24.3 torr at 273k and 135 torr at 325k
Enthalpy of vaporization for the compound will be close to 24.3 kJ/mol. The enthalpy of vaporization is also known as the (latent) heat of vaporization or heat of evaporation.
What is enthalpy in heat?If the change in enthalpy is positive, the reaction is endothermic in nature. A lower enthalpy indicates a process using less energy. Enthalpy (ΔH) is a measure of the overall heat content of the system.It is a state function that is conveniently supplied by the sizable ambient environment and is used in numerous measurements in chemical, biological, and physical systems at a constant pressure.Using the Clausius-Clapeyron equation, you can calculate the enthalpy of vaporisation, H vap. This equation can be expressed in a number of equivalent ways,In (p2/p1) = ΔH vap / R × ( 1 / T1 - 1 /T1 )
P1, P2 - the vapor pressure at 273 K and 325 K, respectively
ΔHvap - the enthalpy of vaporization;
T1, T2 - the two temperatures given to you.
ΔH vap = In (p2/p1) × R / ( 1/ T1 - 1 /T2 )
ΔH vap = ( In (135 torr / 24.3 torr) × 8.314 J / mol × k ) / (1/273 - 1/325 ) K^ -1
ΔH vap = ( 1.7148 × 8.314 J/mol ) / 0.0005861 = 24324.9 J/mol
ΔH vap ≈ 24.3 kJ/mol
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What group forms a negative ion?.
If an extra electron is pushed into the atom so that it has an excessive number of electrons then it would form a negative ion.
The right side of the Periodic Table, or the side with no metals, is where non-metals are located.
Atoms generally experience atomic radius contraction as a result of adding electrons to the same valence shell and protons to the nucleus, with the smallest atoms to the right of the Periodic Table
As a result, the elements on the right side of the Periodic Table, such as fluorine, chlorine, and oxygen, Tend to be oxidizing, which means that their unshielded nuclear charge causes them to accept electron density.
N³⁻,O²⁻,F⁻ and Cl⁻
Clearly, the Parent atoms (or molecules) are unquestionably oxidizing species.
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15. Crushing large stones into smaller stones is an example of a
b. chemical change
a. physical change
c. both a. and b.
d. a change in mass
Answer:
Crushing large stones into smaller stones would be a physical change because you are merily crushing its physical size, while the chemical composition for the stone stayes the same.
