Question 1

What is the percent composition by mass of the substance shown below?

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Question 2

A sample of sodium sulfate (Na₂SO₄)contains 2.3 10²³ sodium cations.How many moles of sulfate anions will be present in the sample?

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Question 3

A sample of magnesium with a mass of 7.76g is combined with 15.00g of sulfur to produce magnesium sulfide.What mass of sulfur does not react?

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Question 4

How many carbon atoms have about the same mass as one mole of titanium atoms?

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Question 5

A 205 g sample of H₂Se contains x moles of hydrogen atoms.Calculate x.

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Question 6

An x-gram sample of P₄O₆ contains 455 g of phosphorus.Calculate x.

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Question 7

Calculate the number of molecules present in 122 g of the compound shown below.

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Question 8

Which of these samples: 1)0.76 moles of titanium 2)70.06g of calcium chloride 3)3.62 10²² moles of water A.Has the greatest mass? B.Has the fewest atoms?

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Question 9

A compound is composed of 49.292% carbon,2.764% hydrogen,and 47.945% chlorine.The compound has a molar mass of 146.19g.
A.What is the empirical formula of the compound?
B.What is the molecular formula of the compound?

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Question 10

You receive a gift of one mole of dollars,the only condition is that you spend it at the rate of one million dollars per second.How many years will it take you to spend the mole of dollars?

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Question 11

A compound is composed of 24.27% carbon,4.08% hydrogen,and 71.65% chlorine.The compound has a molar mass of 98.96g.
A.What is the empirical formula of the compound?
B.What is the molecular formula of the compound?

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Quiz 7: Quantitative Composition of Compounds

What is the percent composition by mass of the substance shown below?

A sample of sodium sulfate (Na2SO4)contains 2.3 1023 sodium cations.How many moles of sulfate anions will be present in the sample?

A sample of magnesium with a mass of 7.76g is combined with 15.00g of sulfur to produce magnesium sulfide.What mass of sulfur does not react?

How many carbon atoms have about the same mass as one mole of titanium atoms?

A 205 g sample of H2Se contains x moles of hydrogen atoms.Calculate x.

An x-gram sample of P4O6 contains 455 g of phosphorus.Calculate x.

Calculate the number of molecules present in 122 g of the compound shown below.

Which of these samples: 1)0.76 moles of titanium 2)70.06g of calcium chloride 3)3.62 1022 moles of water A.Has the greatest mass? B.Has the fewest atoms?

A compound is composed of 49.292% carbon,2.764% hydrogen,and 47.945% chlorine.The compound has a molar mass of 146.19g. A.What is the empirical formula of the compound? B.What is the molecular formula of the compound?

You receive a gift of one mole of dollars,the only condition is that you spend it at the rate of one million dollars per second.How many years will it take you to spend the mole of dollars?

A compound is composed of 24.27% carbon,4.08% hydrogen,and 71.65% chlorine.The compound has a molar mass of 98.96g. A.What is the empirical formula of the compound? B.What is the molecular formula of the compound?

A sample of sodium sulfate (Na₂SO₄)contains 2.3 10²³ sodium cations.How many moles of sulfate anions will be present in the sample?

A 205 g sample of H₂Se contains x moles of hydrogen atoms.Calculate x.

An x-gram sample of P₄O₆ contains 455 g of phosphorus.Calculate x.

Which of these samples: 1)0.76 moles of titanium 2)70.06g of calcium chloride 3)3.62 10²² moles of water A.Has the greatest mass? B.Has the fewest atoms?