chemical equations

Answers for Chemical Equations worksheet

1. iron(III) oxide, carbon monoxide
2. iron(II) oxide, carbon dioxide
4. two
5. three
6. two Fe, four O, one C
7. no: O's don't match
8. yes
9. 1 2 1 2
10. 1 3 3 2

Make sure your significant digits are correct in the following
calculations.

11. 2(1.0079 amu) = 2.0158 amu
      2(15.999 amu) = 31.998 amu
      2(1.0079 amu) + 15.999 amu = 18.015 amu
12. reactants 2(2.0158 amu) + 31.998 amu = 36.030 amu
       products 2(18.015 amu) = 36.030
13. 2.00 g / (1.66054x10^-24 g amu^-1) = 1.20x10²⁴ amu
      1.20x10²⁴ amu / (2.0158 amu molecule^-1) = 5.95x10²³ molecules
14. 32.00 g / (1.66054x10^-24 g amu^-1) = 1.927x10²⁵ amu
      1.927x10²⁵ amu / (31.998 amu molecule^-1) = 6.022x10²³ molecules

back to discussion schedule
to Chem 105 home page