CHEM 110 CHEMISTRY MATH AND LABWORK MOST TESTED QUESTIONS AND ANSWERS GRADED A+ WITH RATIONALES

ESTUDYR


CHEM 110 CHEMISTRY MATH AND LABWORK MOST TESTED QUESTIONS AND
ANSWERS GRADED A+ WITH RATIONALES
1) How many liters is 35.3 mL?

A. 3.53 L
B. 0.353 L
C. 0.0353 L
D. 0.00353 L

Rationale: 1 mL=10−3 L1\text{ mL}=10^{-3}\text{ L}1 mL=10−3 L. So
35.3 mL=35.3×10−3=0.0353 L35.3\text{ mL}=35.3\times10^{-3}=0.0353\text{
L}35.3 mL=35.3×10−3=0.0353 L.



2) Knowing 1 day = 24 hours and 1 hour = 60 minutes, how many minutes are in 5.7 days?

A. 570 minutes
B. 6840 minutes
C. 7200 minutes
D. 8208 minutes

Rationale: 5.7×24=136.85.7\times 24=136.85.7×24=136.8 hours; 136.8×60=8208136.8\times
60=8208136.8×60=8208 minutes.



3) Determine the correct order of metric prefixes (least to greatest): micro-, milli-, centi-, kilo-
.

A. milli < micro < centi < kilo
B. centi < milli < micro < kilo
C. micro < milli < centi < kilo
D. micro < centi < milli < kilo

Rationale: micro 10−610^{-6}10−6 < milli 10−310^{-3}10−3 < centi 10−210^{-2}10−2 < kilo
10310^{3}103.



SCIENTIFIC NOTATION & DECIMAL CONVERSION

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4) Convert 7.32×1067.32 \times 10^{6}7.32×106 to standard form.

A. 732,000
B. 73,200,000
C. 7,320,000
D. 732,000,000

Rationale: Move decimal 6 places right: 7.32 → 7,320,000.



5) Convert 4.65×1034.65 \times 10^{3}4.65×103 to standard form.

A. 465
B. 4650
C. 46.5
D. 0.00465

Rationale: 10310^{3}103 moves decimal 3 places right.



6) Convert 4.65×10−34.65 \times 10^{-3}4.65×10−3 to standard form.

A. 4650
B. 0.465
C. 0.00465
D. 0.000465

Rationale: 10−310^{-3}10−3 moves decimal 3 places left.



7) Convert 7.32×10−47.32 \times 10^{-4}7.32×10−4 to standard form.

A. 0.00732
B. 0.0000732
C. 0.000732
D. 0.00000732

Rationale: Move decimal 4 places left.