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
Answers: 1
Chemistry, 22.06.2019 11:40
Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both
Answers: 2
Chemistry, 22.06.2019 16:50
Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
Answers: 1
Chemistry, 23.06.2019 00:30
Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.
Answers: 1
HOMEWORK # 6. Ch.3.1, Ch.4.1-2.
Use 2 decimal places for atomic masses. SHOW YOUR CALCULATIONS!
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