CHEM 24112 Chapter Notes - Chapter 9: Iron(Iii) Chloride, Chemical Equation, Thionyl Chloride
29 Jun 2018
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Homework 9.2: Mass Calculations
1. Using the average atomic masses given on your periodic table, calculate how many moles of each
substance the following masses represent.
a. 2.62 g of helium gas, He b. 4.95 g of boric acid, H3BO3
c. 8.31 g of calcium fluoride, CaF2d. 9.72 g of ammonia, NH3
e. 0.195 g of magnesium acetate, Mg(C2H3O2)2
2. Using the average atomic masses on your periodic table, calculate the mass in grams of each of the
following samples.
a. 4.25 mol of oxygen gas, O2b. 1.27 millimol of platinum
c. 0.00101 mol of iron (II) sulfate, FeSO4d. 75.1 mol of calcium carbonate, CaCO3
e. 1.35 x 10-4 mol of gold f. 1.29 mol of hydrogen peroxide, H2O2
3. For each of the following unbalanced equations, calculate the mass of each product that could be
produced by complete reaction of 1.55 g of the reactant indicated in boldface.
a. CS2(l) + O2(g) CO2(g) + SO2(g) b. NaNO3(s) NaNO2(s) + O2(g)
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Document Summary
Propane burns in oxygen according to the following balanced chemical equation: c3h8(g) + 5o2(g) 3co2(g) + 4h2o(g). However, when the amount of oxygen present during the burning of the carbon is restricted, carbon monoxide is more likely to result: 2c(s) + o 2(g) For example, when iron is heated and placed in pure chlorine gas, the iron burns according to the following unbalanced reaction: fe(s) + cl2(g) fecl3(s). If 4. 25 g of sulfurous acid undergoes this reaction, what mass of sulfur dioxide is released: elemental phosphorus burns in oxygen with an intensely hot flame, producing a brilliant light and clouds of the oxide product. These properties of the combustion of phosphorus have led to its being used in bombs and incendiary devices for warfare. The unbalanced chemical equation is: socl2(l) + h2o(l) so2(g) + hcl(g). Calculate the mass of water consumed by complete reaction of 35. 0 g of socl2.
