7.E: Quantities in Chemical Reactions (Exercise)
- Page ID
- 133393
Additional Exercises
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If the average male has a body mass of 70 kg, of which 60% is water, how many moles of water are in an average male?
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If the average female is 60.0 kg and contains 0.00174% iron, how many moles of iron are in an average female?
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How many moles of each element are present in 2.67 mol of each compound?
- HCl
- H2SO4
- Al(NO3)3
- Ga2(SO4)3
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How many moles of each element are present in 0.00445 mol of each compound?
- HCl
- H2SO4
- Al2(CO3)3
- Ga2(SO4)3
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What is the mass of one hydrogen atom in grams? What is the mass of one oxygen atom in grams? Do these masses have a 1:16 ratio, as expected?
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What is the mass of one sodium atom in grams?
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If 6.63 × 10−6 mol of a compound has a mass of 2.151 mg, what is the molar mass of the compound?
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Hemoglobin (molar mass is approximately 64,000 g/mol) is the major component of red blood cells that transports oxygen and carbon dioxide in the body. How many moles are in 0.034 g of hemoglobin?
Answers
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2,330 mol
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- 2.67 mol of H and 2.67 mol of Cl
- 5.34 mol of H, 2.67 mol of S, and 10.68 mol of O
- 2.67 mol of Al, 8.01 mol of N, and 24.03 mol of O
- 5.34 mol of Ga, 8.01 mol of S, and 32.04 mol of O
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H = 1.66 × 10−24 g and O = 2.66 × 10−23 g; yes, they are in a 1:16 ratio.
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324 g/mol