# only 28 Transcribed Image Text: Calculate each of the following: (a) Mass fraction of Cl in calcium chlorate (b) Mass fraction

Excerpt
For 85.5 g of propane, calculate (a) moles of compound; (b) grams of carbon. 3.29 The effectiveness of a nitrogen fertilizer is determined mainly by its mass % N. Rank the following fertilizers, most ef- fective first: potassium nitrate; ammonium nitrate; ammonium sulfate; urea, CO(NH2)2.

only 28 Transcribed Image Text: Calculate each of the following:
(a) Mass fraction of Cl in calcium chlorate
(b) Mass fraction of N in dinitrogen trioxide
Problems in Context
3.24 Oxygen is required for the metabolic combustion of foods.
Calculate the number of atoms in 38.0g of oxygen gas, the amount
absorbed from the lungs in about 15 min when a person is at rest.
8.25 Cisplatin (right), or Platinol, is
used in the treatment of certain cancers.
CI-
Calculate (a) the amount (mol) of com-
pound in 285.3 g of cisplatin; (b) the
number of hydrogen atoms in 0.98 mol
of cisplatin.
Pt –
H-
3.26 Allyl sulfide (below) gives garlic its characteristic odor. Cal-
culate (a) the mass (g) of 2.63 mol of allyl sulfide; (b) the number
of carbon atoms in 35.7 g of allyl sulfide.
H
S-
C-
3.27 Iron reacts slowly with oxygen and water to form a compound
commonly called rust (Fe,03-4H,O). For 45.2 kg of rust, calculate
(a) moles of compound; (b) moles of Fe,O3; (c) grams of Fe.
3.28 Propane is widely used in liquid form as a fuel for barbecue
grills and camp stoves. For 85.5 g of propane, calculate (a) moles
of compound; (b) grams of carbon.
3.29 The effectiveness of a nitrogen fertilizer is determined
mainly by its mass % N. Rank the following fertilizers, most ef-
fective first: potassium nitrate; ammonium nitrate; ammonium
sulfate; urea, CO(NH2)2.