6.7: Quantities in Chemical Reactions (Exercise)
 Page ID
 15250
Additional Exercises

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?

If the average female is 60.0 kg and contains 0.00174% iron, how many moles of iron are in an average female?

How many moles of each element are present in 2.67 mol of each compound?
 HCl
 H_{2}SO_{4}
 Al(NO_{3})_{3}
 Ga_{2}(SO_{4})_{3}

How many moles of each element are present in 0.00445 mol of each compound?
 HCl
 H_{2}SO_{4}
 Al_{2}(CO_{3})_{3}
 Ga_{2}(SO_{4})_{3}

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?

What is the mass of one sodium atom in grams?

If 6.63 × 10^{−6} mol of a compound has a mass of 2.151 mg, what is the molar mass of the compound?

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

2,330 mol

 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
 0.00445 mol of H and 0.00445 mol of Cl
 0.00890 mol of H, 0.00445 mol of S, and 0.0178 mol of O
 0.00890 mol of Al, 0.0134 mol of C, and 0.0401 mol of O
 0.00890 mol of Ga, 0.0134 mol of S, and 0.0534 mol of O
7. 324 g/mol
8. 5.3 x 10^{7} mol