HOMEWORK # 6. Ch.3.1, Ch.4.1-2. Use 2 decimal places for atomic masses. SHOW YOUR CALCULATIONS!
1. Calculate the molecular or formula mass of each of the following:
(a) P4

(b) Ca(NO3)2

2. Calculate the molar mass of each of the following compounds:

(a) silver sulfate, Ag2SO4

(b) boric acid, B(OH)3

3. Determine the number of moles of compound and the number of moles of each type of atom in the following: 0.325 g of aspirin, C6H4(CO2H)(CO2CH3).

4. A 55-kg person has 7.5 × 10–3 mol of hemoglobin (molar mass = 64,456 g/mol) in the blood. A) How many hemoglobin molecules is this?
b) What is this quantity in grams?

5. Balance the following equations and classify the type of the reactions:

(a)
b)

6. Write a balanced equation describing each of the following chemical reactions, indicate
physical state of substances and type of the reactions:

(a) Solid aluminum metal reacts with solid diatomic iodine to form solid Al2I6.
(b) When solid sodium chloride is added to aqueous sulfuric acid, hydrogen chloride gas and
aqueous sodium sulfate are produced.

7. Complete and balance the following equation, indicate physical state of substances and type of
the reaction: Aqueous H2SO4 reacts with aqueous NaOH