The molarity of h3po4 solution if 0.05 M ba(oh)2 is needed to neutralize 20.00 ml of h3po4 is 0.25 M.
Given,
M₁ =?
valance factor H₃PO₄ (n)₁ = 3
M₂ = 0.05 M
V1 = V2 = 20 m or 0.02 L
valance factor Ba(OH)₂(n)₂ = 2
M₁n₁V₁ = M₂n₂V₂
M₁ = (M₂n₂V₂) / n₁V₁
= 0.05 × 2 × 3
= 0.25 M
Molarity is the number of moles of a substance in keeping with the liter of answer. solutions labeled with the molar awareness are denoted with a capital M; a 1. zero M answer incorporates 1 mole of solute according to the liter of answer. Molality is the variety of moles of solute in step with a kilogram of solvent.
Molarity (M) is the amount of a substance in a positive volume of solution. Molarity is described because the moles of a solute in step with liters of an answer. Molarity is also known as the molar attention of an answer.
Molarity is very crucial in chemistry for one big purpose. it's far the measurement of concentration in any mixture. The molarity of any solution is a way to know the unique factors or compounds which are found in any solution.
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which of the following substances is insolube in water
Answer:
Of the given options; vinegar, salt and sugar completely dissolve in water. However, when sawdust is mixed with water it floats on top indicating it is insoluble in water.
What is Kc at 800K? (The question is in the photo)
ANSWER
The value of Kc at 800K for the above reaction is 1.1642454865
EXPLANATION
Given that;
[tex]\text{ CO}_{(g)}\text{ + H}_2O_{(g)}\rightleftarrows\text{ CO}_{2(g)}\text{ + H}_{2(g)}[/tex]The number of moles of CO = 1 mol
The number of moles of H2O = 1 mol
The number of moles of CO2 = 0.519 mol
The volume of the vessel = 11L
To find the value of Kc, follow the steps below
Step 1: Write the equilibrium for the given reaction
[tex]\begin{gathered} \text{ K}_c\text{ = }\frac{[products]}{[reactants]} \\ \text{ } \\ \text{ K}_c\text{ = }\frac{[CO_2]\times[H_2]}{[CO]\times[H_2O]} \end{gathered}[/tex]Recall, that at equilibrium the mole of CO2 is 0.519 mol
Step 2: Find the mole of each reactant at equilibrium using the stoichiometry ratio
In the above reaction, 1 mole of CO reacts with 1 mole of H2O to give 1 mole of CO2 and 1 mole of H2
Let the number of moles of CO be x
[tex]\begin{gathered} \text{ 1 mol CO }\rightarrow\text{ 1 mol CO}_2 \\ \text{ x mol CO }\rightarrow\text{ 0.519 CO}_2 \\ \text{ cross multiply} \\ \text{ x}\times\text{ 1 = 0.519} \\ \text{ x = 0.519 mol} \end{gathered}[/tex]The number of moles of CO is 0.519 mol
The next step is to find the number of moles of CO at equilibrium
At equilibrium, the number of mol of CO is calculated below
The number of moles of CO at equilibrium = 1 - 0.519
The number of moles of CO at equilibrium = 0.481 mol
Using stoichiometry ratio, the number of mole o water at equilibrium will also be 0.481 mol
Also, the number of moles of hydrogen at equilibrium is 0.519 mol
Step 3: Find Kc by substituting the calculated values into the formula
[tex]\begin{gathered} \text{ K}_c\text{ at 800K = }\frac{0.519\times0.519}{0.481\times0.41} \\ \\ \text{ K}_C\text{ at 800K = }\frac{0.269361}{0.231361} \\ \text{ Kc at 800K = 1.1642454865} \end{gathered}[/tex]can anyone help me with this question please sap
This question is of longitudinal wave and the answer is given below:-
A. Crest
B. Wavelength
C. Amplitude
D. Trough
E. Cycle
F. Amplitude
In a longitudinal wave the particles are displaced parallel to the direction the wave travels. An example of longitudinal waves is compressions moving along a slinky.
Transverse waves cause the medium to move perpendicular to the direction of the wave. Longitudinal waves cause the medium to move parallel to the direction of the wave.
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Which of the following would be most likely to happen if DNA and RNA remained in the nucleus of
the cell?
O RNA polymerase would link nitrogen bases to DNA but not RNA.
O Transcription could not take place.
O DNA functioning would remain the same, but RNA would not be able to make proteins.
O Both DNA and RNA would be double-stranded.
Cells read out or express the genetic instructions in their genes through transcription and translation.
RNA Is Produced by the Transcription of Parts of DNAA cell first copies a specific region of its DNA nucleotide sequence a gene into an RNA nucleotide sequence before reading out a necessary component of its genetic instructions.Despite being replicated into a different chemical form, the information in RNA is still expressed using a nucleotide sequence, which is effectively the same language as DNA. Therefore, transcription.Additionally, as we will see in the following chapter, a cell may modify (or regulate) the expression of each of its genes depending on the circumstances, most obviously by managing the RNA it produces.To Learn more About Cell, Refer:
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Which of the most common radioactive decay particles-x, B, or y-has the least
energy but the most mass?
In general, the ionizing power increases while the penetration power decreases as mass increases. Alpha particles have the highest mass when merely comparing the three most prevalent forms of ionizing radiation.
The mass of an alpha particle is around 8,000 times more than that of a beta particle and is roughly four times that of a proton or neutron. The alpha particle has the strongest ionizing strength and the greatest capacity to harm tissue because of its huge mass. However, because of their size, alpha particles are less able to penetrate solid objects.
Although beta particles have significantly more penetrating capability due to their smaller size than alpha particles, they have far less ionizing power (less capacity to harm tissue).
Gamma rays are a high energy kind of electromagnetic radiation rather than particles (like x-rays, except more powerful). Energy that has neither mass nor charge are gamma rays. Gamma rays can penetrate many inches of thick material (like lead) and are therefore shielded by doing so. A human body may allow gamma rays to pass through completely without interacting with anything.
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Raising the temperature of 10.0 g of water from 10.0°C to 20.0°C requires 418 J, while that increasing 10.0 g of aluminum from 10.0°C to 20.0°C requires 89.7 J. The reason why water requires more heat is because___________.A. water is a liquid and aluminum is a solid. B. 10.0 g of water occupies a larger volume than 10.0 g of aluminum. C. Water has a higher specific heat than aluminum. D. water has higher potential energy than aluminum.
Answer
C. Water has a higher specific heat than aluminum.
Explanation
Increasing of kinetic energy means the intermolecular attraction decreases. For water between any two molecule, there are strong H-bond (hydrogen bond). So, to overcome their bond energy we need more amount of heat than another substance. So water has a high specific heat capacity.
PLEASE ANSWER I AM BEGGING
How many milliliters of a stock solution of 7.00 M HNO3 would you have to use to prepare 0.120 L of 0.480 M HNO3 ? If you dilute 20.0 mL of the stock solution to a final volume of 0.270 L , what will be the concentration of the diluted solution?
Taking into account the definition of dilution:
you have to use 8.23 mL of a stock solution of 7.00 M HNO₃ to prepare 0.120 L of 0.480 M HNO₃.If you dilute 20.0 mL of the stock solution to a final volume of 0.270 L , the concentration of the diluted solution is 0.518 M.DilutionDilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.
In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.
A dilution is mathematically expressed as:
Ci×Vi = Cf×Vf
where
Ci: initial concentrationVi: initial volumeCf: final concentrationVf: final volumeVolume of stock solutionIn this case, you know:
Ci= 7 MVi= ?Cf= 0.480 MVf= 0.120 LReplacing in the definition of dilution:
7 M× Vi= 0.480 M× 0.120 L
Solving:
Vi= (0.480 M× 0.120 L)÷ 7 M
Vi= 0.00823 L= 8.23 mL (being 1 L= 1000 mL)
Finally, you will need 8.23 mL of the stock solution.
Concentration of the diluted solutionIn this case, you know:
Ci= 7 M assuming the stock solution is 7.00 M HNO₃Vi= 20 mL= 0.02 LCf= ?Vf= 0.270 LReplacing in the definition of dilution:
7 M× 0.02 L= Cf× 0.270 L
Solving:
(7 M× 0.02 L)÷ 0.270 L= Cf
0.518 M= Cf
Finally, the concentration is 0.518 M.
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Water's strong hydrogen bonds result in which physical properties? Check all that apply.
high boiling point
low boiling point
high specific heat
low specific heat
density of ice being less than that of liquid water
density of ice being greater than that of liquid water
(Please see the question in the image) All coefficients that are number two are wrong answers and need to be replaced.
The balanced equation is:
[tex]2\text{NaN}_{3_{}\text{ }}\text{ }\rightarrow3N_2\text{ + 2Na}[/tex]The equation is balanced because we have the same amount of elements in the reactants side (to the left of the arrow) and in the products side (to the right of the arrow).
The correct number of significant figures for the following set of numbers; 1.200, 0.00340, 55000, 80.080 would be
Responses
2, 3, 5, 5
2, 3, 5, 5
4, 5, 2, 4
4, 5, 2, 4
2, 6, 5, 5
2, 6, 5, 5
4, 3, 2, 5
4,3,2,5
Explanation:
All zero placed to the right of a decimal point in a number are significant.
1.200 = two significant figures
The zero written to the left of the first non-zero digits in a number are not significant.
0.00340 = three significant figures.
The zero written without digits and after non-zero digits are not significant.
55000 = two significant figures.
The zero between two non-zero digits in a number are significant.
80.080 = five significant figures.
1. Perform a unit conversion to convert 22 gallons to mL using the following conversion factors:
1 gal = 128 oz
1 fl oz = 29.6 mL
(note, this should be to two significant figures because 22 is two significant figures)
2. Calulate the density of a pice of wood that is 1.05 kg and has a volume of 1,782 mL. Report your answer to three significant figures in g/mL. (note 1,000 g is exactly 1 kg)
The 22 gallons is equal to 83353.6 ml.
The conversion technique is the technique of converting a business's accounting from unmarried access to double entry.
Calculation:-
1 gal = 128 oz
1 fl oz = 29.6 mL
22 gallons = 128 × 22
= 2816 0z
1 fl oz = 29.6 mL
2816 0z = 29.6 × 2816 ml
= 83353.6 ml
A unit conversion expresses the equal property as a unique unit of dimension. as an instance, time may be expressed in mins in preference to hours, at the same time as the distance may be transformed from miles to kilometers, or ft, or every other measure of period.
Conversion price receives its call due to the fact the prices that make up conversion fees are all of the costs incurred to transform uncooked fabric into a completed top. these fees are direct labor and manufacturing overhead.
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the pH of a 0.010 M HOBr solution is 5.3
a. what is [H+] in that solution?
b. what is [OBr-]? What is [HOBr]? (where do the H+ and OBr- ions come from)?
c. what is the value of Ka for HOBr? What is the value of pKa?
The [H⁺] of the solution is 5.01 * 10⁶ M
The [OBr⁻] of the solution is 5.01 * 10⁶ M
The [HOBr] of the solution is 0.01 M
The H⁺ and OBr⁻ ions come from the dissociation of the weak acid HOBr.
The value of Ka is 2.51 * 10⁻⁹
The value of pKa is 5.6
What is the pH of a solution?The pH of a solution is the negative logarithm of the hydrogen ion concentration of a solution.
pH = - log [H⁺]
From the given data:
pH of the solution = 5.3
solving for [H⁺];
[tex][H^{+}] = 10^{-pH}[/tex]
[tex][H^{+}] = 10^{-5.3}[/tex]
[H⁺] = 5.01 * 10⁶ M
The equation of the dissociation of the weak acid, HOBr is given below:
HOBr (aq) ⇄ H⁺ (aq) + OBr⁻ (aq)
Moles of H⁺ (aq) = OBr⁻ (aq)
Therefore, [H⁺] = [OBr⁻]
[OBr⁻] = 5.01 * 10⁶ M
The acid dissociation constant, Ka, is calculated as follows:
Ka = [H⁺] * [OBr⁻] / [HOBr]
where [HOBr] = concentration of the weak acid, HOBr.
At equilibrium [HOBr] >>> [H⁺] and [OBr⁻]
[HOBr] = 0.010 M
Ka = (5.01 * 10⁶ M * 5.01 * 10⁶ M) / 0.010 M
Ka = 2.51 * 10⁻⁹
pKa = - log (Ka)
pKa = - log (2.51 * 10⁻⁹)
pKa = 5.6
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determine which reaction will occur.
1) 2Li(s) + Mg2+ = 2Li+ + Mg(s)
2) Fe(s) + Zn2+ = Fe2+ + Zn(s)
The first reaction 2Li(s) + Mg^2+(aq)---> 2Li^+(aq) + Mg(s) would occur because lithium is above magnesium in the electrochemical series.
Which reaction would occur?We know that the possibility that one metal can be able to displace the other is only brought about by the position of the metals in the electrochemical series.
We know that the metals that are higher in the series are able to displace the metals that are lower in the series from an aqueous solution of the salts of the lower metal. In this case the lithium metal is above the magnesium metal so it can be able to displace it from solution.
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What is the theoretical yield of ammonia if 1.0 g N2 and 1.5g H2 reacted? N2(g)+ 3H2(g) 2NH3(g) ΔG = -9.9 kJ/mol
The theoretical yield of NH₃ based on the equation of the reaction is 1.82 g.
What is the theoretical yield of a substance?The theoretical yield of a substance is the amount of a substance that can be produced from the limiting reactants based on the equation of the reaction.
The equation of the reaction is given below:
N₂(g )+ 3 H₂ (g) ---> 2 NH₃ (g) ΔG = -9.9 kJ/mol
Moles of N₂ = 1 / 28
moles of N₂ = 0.0357 moles
Moles of H₂ = 1.5 / 2
Moles of H₂ = 0.75 moles
The limiting reactant is N₂
Mole ratio of N₂ and NH₃ is 1 : 3
Theoretical yield of NH₃ = 0.0357 * 3 * 17
Theoretical yield of NH₃ = 1.82 g
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Hydrogen emits light with a wavelength of 410 nm. Find the frequency of this light. Find the energy contained by a single photon of this light in kJ.
The energy contained by a single photon of this light is 4.84 x[tex]10^{-22}[/tex] J.
λ = 410 nm
V= C/r
Where, V = frequency
C = speed of light
r = wavelength
also 1 nm =[tex]10^{-9}[/tex] m
410nm = 410 x [tex]10^{-9}[/tex]m
V = 3x[tex]10^{8}[/tex]/ 410x[tex]10^{-9}[/tex] = 7.31×[tex]10^{14}[/tex] Hz
E = hc/λ
where h-Planck's constant 6.626x[tex]10^{-34}[/tex] J-S
E = 6.626x[tex]10^{-34}[/tex]X 3X[tex]10^{8}[/tex]
As all values. must be placed in s1 units
410 x10-9
E = Energy 4.84 x[tex]10^{-19}[/tex] Joules.
The light emitted by hydrogen atoms is red because of its four characteristic lines. The strongest line in that spectrum is at 656 nm, the red part of the visible spectrum, and is the number of waves passing through a fixed point per unit of time. Also, the number of cycles or oscillations per unit of time experienced by an object in periodic motion. When you pass an electric current through a tube of hydrogen gas, the electrons of the hydrogen atoms absorb energy and jump to a higher energy level. When these electrons drop to a lower energy level, they emit light.
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The chemical reaction that you will model is shown below. Calcium oxide (CaO) is a white
solid with a crystalline structure. It is made by heating limestone, coral, seashells, or chalk,
which are composed mainly of calcium carbonate (CaCO3). During the heating process,
carbon dioxide (CO2) is released and calcium oxide (CaO) is produced. Commercially,
calcium oxide is called lime. One of the oldest uses of lime is to make mortar, a substance
used in construction to secure bricks, stones, and blocks together.
CaCO3 → CaO + CO2
Calcium carbonate is made by passing carbon dioxide through slaked lime or calcium oxide CaO. Mainly eggshells, sedimentary rocks and minerals, seashells etc. are composed of calcium carbonate, CaCO₃.
What is calcium carbonate?Calcium carbonate is an inorganic compound made by passing carbon dioxide gas through slaked lime or calcium oxide. This reaction is an example of combination reaction.
Calcium carbonate can be easily decomposed into its constituents carbon dioxide and and calcium oxide. The decomposition of calcium carbonate is an exothermic reaction thus heat is evolved to the surrounding.
Rocks and minerals are mainly made of calcium deposits. Calcium carbonate is mainly found in minerals, sedimentary rocks, eggshells, seashell etc.
Therefore the materials which are composed of calcium carbonate are, minerals, eggshells, seashells etc.
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What is the molar mass of phosphorus trichloride (PCI3)
Answer:
137.33 g/mol
Explanation:
Molar mass of PCl3 = 137. 332761 g/mol
Convert grams Phosphorus Trichloride to moles or moles Phosphorus Trichloride to grams
Molecular weight calculation:
30.973761 + 35.453*3
PLEASE HURRY ASAP
The image below shows a certain type of global wind:
The Earth is shown as a circle. Equator is shown and labeled at 0 degrees. 30 degrees north and south latitudes are shown and labeled. 60 degrees north and south latitudes are shown and labeled. Curved arrows are shown pointing from the top and bottom ends of the circle towards 60 degrees north and s
What best describes these winds?
Polar easterlies caused due to sinking, cool air above the poles
Polar easterlies caused due to rising, warm air above the poles
Trade winds caused due to sinking, cool air above the equator
Trade winds caused due to rising warm air above the equator
Answer:
Polar easterlies caused due to sinking, cool air above the poles
Explanation:
I hope this helps! If it does would you please mark me brainliest?
what is the mole ratio between sodium nitrate and sodium oxide?
The mole ratio between sodium nitrate and sodium oxide is 2:1.
What is the mole ratio?The mole ratio between two or more components of a reaction is the stoichiometric number of moles of each component.
The stoichiometric number of mole of a species of a chemical equation is the coefficient of the species when the equation is balanced.
A balanced equation is one in which the number of atoms of elements in the equation is conserved before and after the reaction.
Looking at the equation:
[tex]2NaNO_3 + PbO -- > Pb(NO_3)_2 + Na_2O[/tex]
The number of atoms of each element before and after the reaction is the same.
The coefficient of sodium nitrate is 2.
The coefficient of sodium oxide is 1.
Thus, the mole ratio between sodium nitrate and sodium oxide is 2:1.
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Learning task 1 identify the reactant needed in the following chemical equation1. ___ + ___ = Mg(OH)22. ___ + ___ = NaCl3. ___ + ___ = H2SO44. ___ + ___ = Al(PO4)35. ___ + ___ = SO2
Number 1
The complete reaction:
[tex]MgO\text{ + H}_2O\text{ = Mg\lparen OH\rparen}_2[/tex]Magnesium oxide + water
MgO + H2O = Mg(OH)2
------------------
Number 2
The reaction:
[tex]2Na\text{ + Cl}_2\text{ = 2NaCl}[/tex]2 Na + Cl2 = 2 NaCl
------------------
Number 3
The reaction:
[tex]SO_3\text{ + H}_2O\text{ = H}_2SO_4[/tex]-----------------
Number 4
[tex]Al\text{ + PO}_4=\text{ Al\lparen PO}_4)_3[/tex]----------------
Number 5
[tex]S\text{ +O}_2=\text{ SO}_2[/tex]If we had 175.5 liters of argon, how many moles would this be?
The number of moles of argon = 7.835moles
Appropriate ratio = 1mole/22.4L
Explanations:To get the number of moles of argon, we will use the conversion rate as shown:
1 mole = 22.4 L
Convert 175.5 liters of argon to moles
[tex]\begin{gathered} moles\text{ of argon}=175.5\cancel{L}\times\frac{1mole}{22.4\cancel{L}} \\ moles\text{ of argon=}\frac{175.5}{22.4}mole \\ mole\text{ of argon}=7.835moles \end{gathered}[/tex]The equivalent number of moles of 175.5 liters of argon is 7.835 moles and the appropriate ratio is 1/22.4L
how does elemt's atomic mass differ from its mass number?
Answer:
Mass number is a whole number because it is the sum of number of proton and number of neutrons whereas atomic mass is fractional because it is the average relative mass of its atoms as compared with mass an atom of C-12 isotope taken as 12.
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What is the reason for formulating a product containing active drugs and additive chemicals
Products containing active drugs and additive chemicals are formulated as medicines for curative purposes as well as for improving the quality of food or food products.
What are medicines?Medicines are substances that are taken for the prevention or treatment of diseases.
Medicines are prepared from active drugs and additive chemicals.
Active drugs are substances that when taken into the body produce physiological changes in the body.
Drugs are usually used to prepare medicines.
Additive chemicals are added to substances to improve or enhance their qualities.
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How many SF does this number have: 0.88400
Answer:
The number 0.88400 has 3 significant figures.
Explanation:
The number 0.88400 has 3 significant figures because, zeros to the left of the first significant figure is not significant, and only for numbers greater that 1, the zeros to the right of the decimal point are significant.
If you have 15.0 g of Na, how many grams of O2 are required for the reactionSodium reacts with oxygen to produce sodium oxide.4Na(s)+O2(g)→2Na2O(s)
Firstly we convert the mass of Na to moles of Na:
[tex]\begin{gathered} _nNa_{(s)}=\frac{mass}{molar\text{ }mass} \\ _nNa_{(s)}=\frac{15.0g}{14\text{ }gmol^{-1}} \\ _nNa_{(s)}=1.07\text{ }mole \end{gathered}[/tex]Based on the mole ratio 4 moles of Na reacts with 1 mole of O2. Therefore 1.07 mole of Na would react with x mole of oxygen gas. We determine x by:
[tex]\begin{gathered} _nO_{2(g)}=1.07\text{ }mole\div4 \\ _nO_{2(g)}=0.27\text{ }mole \end{gathered}[/tex]We will now convert 0.27mol of oxygen gas to mass of oxygen gas:
[tex]\begin{gathered} mass=mole\times molar\text{ }mass \\ mass=0.27\times32\text{ }gmol^{-1} \\ mass=8.64g \end{gathered}[/tex]Mass of O2 is 8.64g
To what volume should 24 mL of a 6.00 M sulfuric acid solution be diluted in order to obtain a final solution that is 1.50 M?
They ask us to make a solution starting from a solution with a higher concentration, to find the final volume we will apply the following relationship of concentration and volume:
[tex]C_1V_1=C_2V_2[/tex]Where,
C1 is the initial concetration, 6.00M
V1 is the initial volume, 24mL
C2 is the final concentration, 1.50M
V2 is the final volumen, unknown
We clear V2 and replace the known data:
[tex]V_2=\frac{C_1V_1}{C_2}[/tex][tex]\begin{gathered} V_2=\frac{6.00M\times24mL}{1.50M} \\ V_2=96mL \end{gathered}[/tex]The solution has to be diluted until a volume equal to 96mL
Answer: 96mL
Forming a chemical bond ____.
The ability to build molecules is made possible by a chemical bond, which is a strong attraction between atoms, ions, or molecules. The bond may be created by the sharing of electrons in covalent bonds or by the electrostatic interaction between ions that have opposing charges.
Chemical bonds keep the atoms in molecules together. Electrostatic forces between negatively charged electrons and positively charged atomic nuclei produce bonds (the positions of which in space are determined by quantum mechanics).
The three basic types of bonds are metallic, ionic, and covalent.
Definition: Valence electrons are moved from one atom to the next to finish the outer electron shell, creating an ionic bond. Example: NaCl is a typical ionically bonded substance (Salt)
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Based on the amount of sugar added, which sequence ranks the coffee from the sweetest coffee to the least-sweet coffee?
The coffee from the sweetest coffee to the least-sweet coffee is ranked as follows:
i, ii, iv, iii.
The correct option is D.
What is coffee?Coffee is a darkly colored, bitter, and slightly acidic drink prepared from roasted coffee beans. The coffee has a stimulating effect on humans, primarily due to its caffeine content.
We will compare which coffee is the sweetest by dividing the masses of coffee in ii and iii by 2 to determine how much sugar there are per 100 g of coffee:
ii. 10 g of sugar added to 200 g of coffee will then be 5 g of sugar per 100 g of coffee.
iii. 4 g of sugar added to 200 g of coffee will then be 2 g of sugar per 100 g of coffee
Therefore we have that :
i. 10 g of sugar per 100 g of coffee
ii. 5 g of sugar per 100 g of coffee
iii. 2 g of sugar per 100 g of coffee
iv. 4 g of sugar per 100 g of coffee
In conclusion, we have that the sweetest coffee is i because it has the biggest amount of sugar per 100 g of coffee, then we have ii, iv, iii in that order.
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This is the full question here;
In a coffee shop, the following coffee samples are prepared for customers.
i. 10 g of sugar added to 100 g of coffee
ii. 10 g of sugar added to 200 g of coffee
iii. 4 g of sugar added to 200 g of coffee
iv. 4 g of sugar added to 100 g of coffee
Based on the amount of sugar added, which sequence ranks the coffee from the sweetest coffee to the least-sweet coffee?
i, ii , iii, iv
iii, iv, ii, i
iv, i, ii, iii
i, ii, iv, iii
Would Krypton (Kr), normally be expected to react and form compounds?
A Yes, because Krypton has 7 valence electrons, and a high electronegativity.
B No, because Krypton has 8 valence electrons, and no electronegativity.
C No, because Krypton has 8 valence electrons, and no ionization energy.
D Yes, because Krypton has 7 valence electrons, and a high ionization energy.
B No, because Krypton has 8 valence electrons, and no electronegativity.
Other than fluorine gas, nothing else reacts with it. Commercially, krypton is used as the refueling gas for fluorescent lights. Some flash lights used in high-speed photography also make use of it.
Why does krypton not react?
This is due to the fact that Krypton's fourth energy level valence electrons are more thoroughly shielded by inner electrons than those of the lighter noble gases.
Krypton (Kr) is a chemical element that is a rare gas belonging to Periodic Table Group 18 (noble gases). It only forms a small number of chemical compounds. Krypton is monoatomic, colorless, odorless, and about three times heavier than air.
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What is the mass in grams of 6.75×10^15 molecules of NO2
Answer:
1.227 x 10^-6
Explanation:
1 mole= 6.022 x 10^23 atoms
