1. A hyrocarbon sample with a mass of 6 grams underwent combustion, producing 11 grams of carbon dioxide. If all of the carbon initally present in the compound was converted to carbon dioxide, what was the percent of carbon, by mass, in the hydrocarbon sample.
2. A sample of propane was completely burned in air at STP. The reaction occured as shown below
C3H8 + O2 --------> 3CO2 + 4H20
If 67.2 liters of CO2 were produced and all of the carbon in the CO2 came from the propane, what was the mass of the propane sample?
3. The concentration of sodium chloride in sea water is about 0.5 molar. How many grams of NaCl are present in 1kg of sea water?
4. What is the STP volume of SO2 gas produced when 145 grams of ZnSO3 are consumed?
ZnSo3(s) -----> ZnO(s) + SO2
2006-12-15
17:27:56
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2 answers
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asked by
Anonymous
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Chemistry