Wednesday, February 26, 2014
Tuesday, February 25, 2014
Wednesday, February 12, 2014
Tuesday, February 11, 2014
Monday, February 10, 2014
Wednesday, February 5, 2014
Page #802 Problem #23:
23. Calculate The combustion of acetylene gas is represented by this equation:
2C2H2 + 5O2 ---> 4CO2 + 2H2O
a. How many grams of CO2 and grams of H2O are produced when 52.0 g C2H2 burn in oxygen?
.928 mol of H2O 1.85 mol of CO2
16.7 g of H2O 81.7 g of CO2
b. How many moles of H2O are produced when 64.0 g C2H2 burn in oxygen?
1.14 mol of H2O
Tuesday, February 4, 2014
Pages #793-798 Problems #11-16:
11. a) 4 mol Al 3 mol O2 4 mol Al
3 mol O2 4 mol Al 2 mol Al2O3
2 mol Al2O3 3 mol O2 2 mol Al2O3
4 mol Al 2 mol Al2O3 3 mol O2
b) 7.4 mol Al
12. a) 11.1 mol O2
b) 0.52 mol Al2O3
13. 2.03 g C2H2
14. 1.36 mol CaC2
15. 4.82x10E22 molecules O2
16. 11.5 g NO2
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