CHMA10H Chapters 4 Self Assessment test 2008
To get the most out of this exercise, you should review the lecture notes and text book before
you do this quiz.
You should not take longer than30 minutes to answer these 10 questions.
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
1) When the reaction C4H10 + O2 :CO2 + H2O is balanced using the smallest whole number coefficients, the
coefficient in front of O2 is _____.
2) In a chemical reaction, the substance that runs out first, causing the reaction to stop, is the __________.
3) The molarity of a solution prepared by dissolving 1.00 g of sodium chloride in enough water to make 250 ml of
solution is __________.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
4) Which of the following are combustion reactions?
1) CH4 (g) + O2 (g) :CO2 (g) + H2O (l)
2) CaO (s) + CO2 (g) :CaCO3 (s)
3) PbCO3 (s) :PbO (s) + CO2 (g)
4) CH3OH (l) + O2 (g) :CO2 (g) + H2O (l)
A) 2, 3, and 4 B) 3 and 4 C) 1, 2, 3, and 4 D)1 and 4 E) 1, 3, and 4
5) How many moles of Boron Trichloride, BCl3(g) are needed to produce 25.0 g of HCl(aq) when BCl3 reacts with
water to produce HCl(aq) and Boron Trihydroxide?
A) 2.06 mol B) 4.38 mol C) 0.686 mol D) 0.229 mol
6) The reaction HNO3(aq) + KOH(aq) :KNO3(aq) + H2O(l) is best classified as a(n)
A) precipitation reaction. B) oxidation-reduction reaction.
C) acid-base neutralization reaction. D) single replacement reaction.
7) What volume of 2.0 M HCl, in mL, is required to dissolve a 10.0 g piece of Zn?
Zn(s) + 2 HCl :ZnCl2 + H2(g)
A) 170 mL B) 330 mL C) 150 mL D) 310 mL E) 76 mL
8) 10 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation
shown below. Which one of the following statements is false?
N2(g) + 3 H2(g) :2 NH3(g)
A) Hydrogen is the excess reactant. B) 2.8 grams of hydrogen are left over.
C) The theoretical yield of ammonia is 15 g. D) Nitrogen is the limiting reactant.
9) A student dissolved 3.00 g of Co(NO3)2 in enough water to m,ake 100. mL of stock solution. He took 4.00 mL
of the solution then diluted it with water to give 275 mL of a final solution. How many grams of NO3- ion are
there in the final solution?
A) 0.0296 g B) 0.0813 g C) 0.0407 g D) 0.0148 g
10) What is the concentration of NO3- ions in a solution prepared by dissolving 15.0 g of Ca(NO3)2 in enough
water to produce 300. mL of solution?
A) 0.403 M B) 0.305 M C) 0.152 M D) 0.609 M
Testname: CHAPTER 4 REVIEW
2) limiting reactant
3) 0.0684 M
CHMA10H Chapters 5 Self Assessment test 2008