University of Toronto CHMA10 – Introductory Chemistry I: Structure and Bonding Final Exam Review

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UNIVERSITY OF TORONTO



CHMA10 Introductory Chemistry I:
(Structure and Bonding)
Final Exam Review



Course: CHMA10 Introductory Chemistry I: (Structure
and Bonding)

, CHMA10 – Introductory Chemistry I: (Structure and Bonding)
Final Exam Review
Question 1. How many atoms are in 2.50 moles of CO2?
A) 4.52 x 1024 atoms
B) 1.51 x 1024 atoms
C) 5.02 x 1023 atoms
D) 3.01 x 1024 atoms
E) 7.53 x 1023 atoms

Question 3. Methane and oxygen react to form carbon dioxide and water. What mass of water is formed if 0.80 g of methane
reacts with 3.2 g of oxygen to produce 2.2 g of carbon dioxide?
A) 1.8 g
B) 2.2 g
C) 3.7 g
D) 4.0 g
E) 4.2 g

Question 4. How many moles of oxygen are formed when 58.6 g of KNO 3 decomposes according to the following reaction? The
molar mass of KNO3 is 101.11 g/mol.
4 KNO3(s) → 2 K2O(s) + 2 N2(g) + 5 O2(g)
A) 0.290 mol O2
B) 0.580 mol O2
C) 18.5 mol O2
D) 0.724 mol O2
E) 1.73 mol O2

Question 5. Determine the number of grams H2 formed when 250.0 mL of 0.743 M HCl solution reacts with 3.41 x 1023 atoms of
Fe according to the following reaction.
2 HCl(aq) + Fe(s) → H2(g) + FeCl2(aq)
A) 0.374 g
B) 1.33 g
C) 1.14 g
D) 0.187 g
E) 1.51 g

Question 6. Which of the following pairs of aqueous solutions will form a precipitate when mixed?
A) HCl + LiOH
B) Li2S + HCl
C) K2CO3 + HNO3
D) MgCl2 + KOH
E) All of these solution pairs will produce a precipitate.

Question 7. Which of the following is an acid base reaction?
A) C(s) + O2(g) → CO2(g)
B) 2 HClO4(aq) + Ca(OH)2(aq) → 2 H2O(l) + Ca(ClO4)2(aq)
C) Fe(s) + 2 AgNO3(aq) → 2 Ag(s) + Fe(NO3)2(aq)
D) MgSO4(aq) + Ba(NO3)2(aq) → Mg(NO3)2(aq) + BaSO4(s)
E) None of the above are acid base reactions.

Question 8. What element is undergoing reduction (if any) in the following reaction?
Zn(s) + 2 AgNO3(aq) → Zn(NO3)2(aq) + 2 Ag(s)