1. If aspirin is made using the raw materials
salicylic acid and acetic anhydride with a yield
of 75%, how many grams of aspirin will be
produced
A. 25 B. 15
C. 30 D. 1
2. Classify each of the following as homogeneous
or heterogeneous:
I. a door
V. the water you drink
II. the air you breathe
V. salsa
III. a cup of coffee (black)
VI. your lab partner
A. hetero, homo, homo, C. homo, homo, homo,
homo, hetero, hetero homo, hetero, homo
B. hetero, hetero, homo, D. homo, homo, hetero,
homo, homo, hetero hetero, homo, hetero
3. How many beta particles are emitted in the
decomposition of 23892U to 20682Pb?
A. 4 B. 2
C. 6 D. 8
4. Give the mass empirical formula of the
following compound if a sample contains 57.8%C,
36%H, and 38.6%O by mass.
A. C2HO B. C4H3O2
C. C8H6O4 D. C12H9O6
5. The decomposition of iodoethane in the gas
phase proceeds according to the following
reactions:
C2H5I (g) C2H4 (g) + HI (g)
At 660 K, k = 7.2x10-4 /s and at 720 K, k =
1.70x10-2/s. If the initial pressure of
iodoethane is 894 torr at 2450C, what is the
pressure of iodoethane after three half-lives?
, A. 429 torr B. 112 torr
C. 356 torr D. 508 torr
6. Where in the body does fatty acid synthesis
occur?
A. Mitochondrion B. Cytoplasm
C. Ribosomes D. Golgi apparatus
7. A solution of an unknown base was titrated
with 0.150 M HCl, and 22.0 mL of acid was needed
to reach the end point of the titration. How many
moles of the unknown base were in the
solution?
A. 2.2x10-3 ml B. 1.2x10-3 ml
C. 0.9x10-3 ml D. 3.3x10-3 ml
8. Suppose you have a phosphate buffer of pH 7.21.
If you add more solid NaH2PO4 to this buffer,
would you expect the pH of the buffer to increase,
decrease, or remain unchanged?
A. increase D. either increase or
C. remain the same decrease
B. decrease
9. A water sample contains 60 mg/L of calcium, 60
mg/L of magnesium and 25 mg/L of sodium. What is
the total hardness in mg/L as CaCO3?
A. 7.9 B. 395
C. 85 D. 145
10. What is the theoretical oxygen demand in
liters of air for 300 mg/L solution of
methylamine, CH3NH2, to decompose completely?
A.4.2 L B.5.8 L
C. 2.9 L D. 3.6 L
salicylic acid and acetic anhydride with a yield
of 75%, how many grams of aspirin will be
produced
A. 25 B. 15
C. 30 D. 1
2. Classify each of the following as homogeneous
or heterogeneous:
I. a door
V. the water you drink
II. the air you breathe
V. salsa
III. a cup of coffee (black)
VI. your lab partner
A. hetero, homo, homo, C. homo, homo, homo,
homo, hetero, hetero homo, hetero, homo
B. hetero, hetero, homo, D. homo, homo, hetero,
homo, homo, hetero hetero, homo, hetero
3. How many beta particles are emitted in the
decomposition of 23892U to 20682Pb?
A. 4 B. 2
C. 6 D. 8
4. Give the mass empirical formula of the
following compound if a sample contains 57.8%C,
36%H, and 38.6%O by mass.
A. C2HO B. C4H3O2
C. C8H6O4 D. C12H9O6
5. The decomposition of iodoethane in the gas
phase proceeds according to the following
reactions:
C2H5I (g) C2H4 (g) + HI (g)
At 660 K, k = 7.2x10-4 /s and at 720 K, k =
1.70x10-2/s. If the initial pressure of
iodoethane is 894 torr at 2450C, what is the
pressure of iodoethane after three half-lives?
, A. 429 torr B. 112 torr
C. 356 torr D. 508 torr
6. Where in the body does fatty acid synthesis
occur?
A. Mitochondrion B. Cytoplasm
C. Ribosomes D. Golgi apparatus
7. A solution of an unknown base was titrated
with 0.150 M HCl, and 22.0 mL of acid was needed
to reach the end point of the titration. How many
moles of the unknown base were in the
solution?
A. 2.2x10-3 ml B. 1.2x10-3 ml
C. 0.9x10-3 ml D. 3.3x10-3 ml
8. Suppose you have a phosphate buffer of pH 7.21.
If you add more solid NaH2PO4 to this buffer,
would you expect the pH of the buffer to increase,
decrease, or remain unchanged?
A. increase D. either increase or
C. remain the same decrease
B. decrease
9. A water sample contains 60 mg/L of calcium, 60
mg/L of magnesium and 25 mg/L of sodium. What is
the total hardness in mg/L as CaCO3?
A. 7.9 B. 395
C. 85 D. 145
10. What is the theoretical oxygen demand in
liters of air for 300 mg/L solution of
methylamine, CH3NH2, to decompose completely?
A.4.2 L B.5.8 L
C. 2.9 L D. 3.6 L
