Homework# 16

Questions 1-12 page 180

1. The law of conservation of matter states that matter is neither created nor destroyed during a chemical reaction.

2. The scientific law are the laws that describe the behavior of events in nature without providing explainations for the events. The laws summarize what sceientist have learned about nature.

3. The terms "using up" and "throwing away" are misleading because the law of conservation of matter states that you can not use up atoms because atoms can not be lost or gained, just recycled and changed due to chemical reactions.

4.
a. Not balanced - Reactant side: Sn, 1; H, 1; F, 1; Product side: Sn, 1; H, 2; F; 2
b. Not balanced - Reactant side: Si, 1; O, 2; C, 1; Product Side: Si, 1; O, 1; C, 2
c. Balanced - Reactant side: Al, 1; O, 3; H, 6; Cl, 3; Product Side: Al, 1; O, 3; H, 6; Cl, 3

5.
a. 3
b. 2
c. 1

6.
a. 1, 3, 1, 3
b. 2, 3, 2, 2
c. 4, 2, 3
7.
a. 1, 3, 2, 3
b. 2, 25, 16, 18

8.
a. Yes
Reactants:
S: 1
O: 4
K: 2
Cl: 2
Products:
S: 1
O: 4
K: 2
Cl: 2
b. No, because subscripts always stay the same, but coefficients can change
c. 1, 2, 1, 2

9. 400,000 per 1 billion dollars

10.
a. 32 g
b. 48 g
c. 100 g
d. 58 g
e. 180 g

11. The atomic mass is also an atom's atomic weight. The atomic mass which remains the same for each element.

12.
a. 1 atom
b. .5 atoms
c. .1 atoms
d. .03 atoms