A. The mass (in grams) of Ce(NO₃)₄ that will be required to make the solution is 24.16 g
B. The concentration of the nitrate ions in the solution is 1.66 M
C. The new concentration of the Ce(NO₃)₄ solution is 0.178 M
We'll begin by calculating the number of mole of Ce(NO₃)₄ in the solution.
Molarity = 0.415 M
Volume = 150 mL = 150 /1000 = 0.15 L
Mole of Ce(NO₃)₄ =?Mole = Molarity × Volume
Mole of Ce(NO₃)₄ = 0.415 × 0.15
Mole of Ce(NO₃)₄ = 0.06225 moleA. Determination of the mass of Ce(NO₃)₄ required to make the solution.
Mole of Ce(NO₃)₄ = 0.06225 mole
Molar of Ce(NO₃)₄ = 140.12 + 4[14 + (16×3)]
= 140.12 + 4[14 + 48]
= 140.12 + 4[62]
= 140.12 + 248
= 388.12 g/mol
Mass of Ce(NO₃)₄ =?Mass = mole × molar mass
Mass of Ce(NO₃)₄ = 0.06225 × 388.12
Mass of Ce(NO₃)₄ = 24.16 gTherefore, 24.16 g of Ce(NO₃)₄ is required to make the solution.
B. Determination of the concentration of the nitrate ion, NO₃¯ in the solution.
In solution, Ce(NO₃)₄ will dissociate as follow:
Ce(NO₃)₄ (aq) —> Ce⁴⁺(aq) + 4NO₃¯(aq)
From the balanced equation above,
1 mole of Ce(NO₃)₄ contains 4 moles of NO₃¯
Therefore,
0.415 M solution of Ce(NO₃)₄ will contain = 0.415 × 4 = 1.66 M NO₃¯
Thus, 1.66 M of the nitrate ion, NO₃¯, is present in the solution.
C. Determination of the new concentration of the Ce(NO₃)₄ solution.
Volume of stock solution (V₁) = 150 mL
Molarity of stock solution (M₁) = 0.415 M
Volume of diluted solution (V₂) = 350 mL
Molarity of diluted solution (M₂) =?
M₁V₁ = M₂V₂0.415 × 150 = M₂ × 350
62.25 = M₂ × 350
Divide both side by 350
M₂ = 62.25 / 350
M₂ = 0.178 MTherefore, the new concentration of the Ce(NO₃)₄ solution is 0.178 M
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A reaction occurs that results in a molecule with two atoms of the same element. The atoms share six electrons. Which molecule could be the product of the reaction?
Si2
N2
O2
F2
Answer:
n2 is correct
Explanation:
i took it just now. :)
The product of this reaction could be N2.
Among the options, only atoms of nitrogen have five electrons on their outermost shell.
The fact that they have five electrons in their outermost shells implies that they can combine by sharing six electrons in a triple bond.
When this occurs, each of the nitrogen atoms involved in the bond now has an octet of electrons. Hence, the product formed when the atoms share six electrons. Which molecule could be the product of the reaction is N2.
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An unknown compound has the following chemical formula: NO_x
where x stands for a whole number.
Measurements also show that a certain sample of the unknown compound contains of oxygen and of nitrogen.
Write the complete chemical formula for the unknown compound.
Answer:
NO_x
Explanation:
you said it
A 200.0 ml beaker filled with oil has a mass of 293.2 g. The mass of just the beaker is 130.2
g. What is the density of the oil?
Answer in a complete sentence. Show your work. Your final answer should have the cor-
rect number of sig figs. show work!
Answer:p=m/v
p=(292.2-130.2)/200
p=0.8100g/ml
Explanation:
Density of a substance is the ratio of its mass to volume. The density of the oil filled in a 200.01 ml beaker is 0.815 g/ml.
What is density?Density of a substance is the mass per volume. Thus we het how much of its particles are located per one unit of volume.
Mathematically density can be written as mass/ volume. The mass of the beaker containing oil is given as 293.2 g. The mass of beaker itself is 130.2 g. Hence, mass of oil is 293.2 - 130.2 = 163 g.
Volume of the oil is 200 ml. Thus density is 163 g/200 ml = 0.815 g/ml.
Hence, the oil in the beaker with 200 ml volume and 163 g mass have a density of 0.815 g/ml.
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Another way to say density
A. Density
B. Mass divided by volume
C. Water
D. Element
In chemistry, densities of substances are often compared to the density of this substance.
A. Density
B. Mass divided by volume
C. Water
D. Element
These have unique densities associated with them.
A. Density
B. Mass divided by volume
C. Water
D. Element
Answer:
A
Explanation:
Another way to say Density is Density
Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. The density is mass divided by volume. the correct option is option A.
What is density?Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water. Density is mass divided by volume.
Mathematically, density can be written as : Density = Mass of the substance÷ volume marked on the graduated cylinder. Density is directly proportional to mass and inversely proportional to volume. Density of water is 1 gram per cubic centimeter.
Therefore, density is mass divided by volume. the correct option is option A.
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If the roller coaster car in the above problem were moving with twice the speed (4m/s), then what would be its
new kinetic energy?
Explanation:
New kinetic energy= ½mv'²
v' =4m/s
m= 2000kg
KE = ½ (2000) (4)²
=16000 Joules
An organic compound containing C, H, O gives the following data on analysis. Composition by mass: %
C = 52.2, % H = 13.0, % 0 = 34.8. Relative molecular mass = 46. Identify the molecular formula of the organic compound.
My answer is C2H6O. Is it correct?
✞➪name the macromolecules that are chosen as drug targets.♔♔♔
Answer:
The macromolecules chosen as drug targets are carbohydrates, lipids, proteins, and nucleic acids.
Explanation:
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