Posted: December 2, 2009
Test - Chemical Changes
Review Worksheet Answers:
Section 10.1
1. 4.65 mol Si
2. 2.17 x 1023 molecules H2O
3. 2.75 x 1024 atoms
4. 7.72 mol NO2
5. 0.249 mol NH3
6. 1.66 x 1024 atoms
7. 1.83 x 1024 atoms Al
Section 10.2
1. 1.27 mol CO2
2. 144 g CO2
3. 21.5 L CH4
4. 0.0393 mol He
5. 88.3 g CH3COOH
6. 53.3 L C3H8
7. 0.1103 mol CaCl2
Section 10.3
1. 72.2% Mg, 27.8% N
2. 21,2% N, 6.11% H, 24.3% S, 48.4% O
b) 26.6% K, 35.4% Cr, 38.1% O
3. NO2
4. HgSO4
5. C5H10O2 (empirical and molecular)
6. Empirical - P2O5
Molecular - P4O10