Section D1-D4

p.121

3.
a. Hydrochloric acid and magnesium reacts to make hydrogen and magnesium chloride.
b. comp, element, element, compound.
c. (on separate piece of paper)

p.125-126

1.
a. methane and oxygen gas reacts to become carbon dioxide and water.
b. (on separate piece of paper)
c. Reactants: Ch4 + 2 O2 Products: CO2 + 2H2O
d. not balanced

2.
a. hydrochloric acid and magnesium form hydrogen gas and magnesium bromide.
b. (on separate piece of paper)
c. Reactants: HBr + Mg Products: H2 + H2O
d. not balanced

3.
a. metallic silver and hydrogen sulfide react to form silver sulfide and water.
b. (on paper)
c. Reactants: 4 Ag + 4 H2S  Products: 2 Ag2S + 4H2O
d.not balanced

4.
a. iron and cordon monoxide react to form iron and carbon dioxide.
b. (on paper)
c. Reactants: Fe2O3 + 3CO Products: 2 Fe + 3 CO2
d. Not balanced

Summary
p. 140

1. c. (a) Hydrogen gas and chlorine gas react to become hydrochloric acid. AND THEN (b) Hydrogen and oxygen react to become water and oxygen gas.

3. The law of conversion of matter: in a chemical reaction, matter is neither created nor destroyed. Molecules can be converted and decomposed by chemical processes, but ATOMS ARE FOREVER!

5.
a. not balanced
b. not balanced
c. not balanced