Chem 1010 - General Chemistry 1 » Summer 2021 » Exam 1 (A)

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Question #1
Which one of the following is  not an empirical formula?
A.   CHO
B.   CH2O
C.   C2H4O2
D.   C2H4O
Question #2
What is the molarity of a NaOH solution if 28.2 mL of a 0.355 M H 2SO 4 solution is required to neutralize a 25.0-mL sample of the NaOH solution?
A.   0.315
B.   0.4
C.   0.629
D.   125
E.   0.801
Question #3
Pure acetic acid (HC 2H 3O 2) is a liquid and is known as glacial acetic acid. Calculate the molarity of a solution prepared by dissolving 10.00 mL of glacial acetic acid at 25°C in sufficient water to give 500.0 mL of solution. The density of glacial acetic acid at 25°C is 1.05 g/mL.
A.   1.26 × 103  M
B.   3.50 × 10-4  M
C.   0.0210 M
D.   0.350 M
E.   21.0 M
Question #4
According to the balanced equation shown below, 4.00 moles of oxalic acid, H 2C 2O 4, reacts with __________ moles of permanganate, MnO 4 -.  5 H 2C 2O 4( aq) + 2 MnO 4 -( aq) + 6 H +( aq) → 10 CO 2( g) + Mn 2+( aq) + 8 H 2O( l)
A.   4
B.   9
C.   1.6
D.   8
Question #5
A substance composed of two or more elements in a fixed, definite proportion is
A.   a heterogeneous mixture.
B.   a solution.
C.   a compound.
D.   an alloy.
E.   a homogeneous mixture.
Question #6
Gas is sold for $1.399 per liter in Toronto, Canada. Your car needs 12.00 gallons. How much will your credit card be charged in Canadian dollars?
A.   $4.44
B.   $63.54
C.   $16.79
D.   $67.15
Question #7
An alligator is 152.4 cm long. How long is he in feet?
A.   32.2 ft
B.   60.0 ft
C.   5.00 feet
D.   12.7 ft
E.   720.0 ft
Question #8
Give the number of protons in P -3.
A.   19
B.   15
C.   18
D.   16
E.   12
Question #9
How many moles are in 2.16 x 10 24 atoms of lead?
A.   0.359 moles
B.   3.59 moles
C.   6.08 moles
D.   35.9 moles
E.   1.79 moles
Question #10
What mass (in mg) does 2.63 moles of nickel have?
A.   2.23 × 104 mg
B.   1.54 x 105 mg
C.   3.56 x 105 mg
D.   129 mg
E.   44.8 mg

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