Q: A patient is prescribed 0.150 mg of a medication. If each tablet contains 75 mcg, how many tablets should the patient take? (1 mg = 1000 mcg)

$$0.150 \times \frac{1000}{75} = 2$$ tablets

Q: Which of the following is the correct equality for converting liters to milliliters?

$$1 \text{ L} = 1000 \text{ mL}$$

Q: A person weighs 164 lb. What is their mass in kilograms? (1 kg = 2.20 lb)

$$164 \times \frac{1}{2.20} = 74.5 kg$$

Q: How many minutes are in 1.4 days?

$$1.4 \times 24 \times 60 = 2.0 \times 10^3$ minutes

Q: Which of the following is the correct formula for density?

$$\text{Density} = \frac{\text{mass}}{\text{volume}}$$

Q: If your pace on a treadmill is 65 meters per minute, how many minutes will it take to walk 7.5 kilometers?

$$7.5 \times 10^3$ \div 65 = 120$$ minutes

Q: A nurse needs to administer 12 grams of cough syrup. If the syrup has a density of 1.20 g/mL and 1 teaspoon is 5.0 mL, how many teaspoons should be given?

$$12 \div (1.20 \times 5.0) = 2.0$$ teaspoons

Question 1

Which of the following statements about significant figures is CORRECT?

Accepted Answer

All nonzero digits and zeros between nonzero digits are significant.

Question 2

A patient is prescribed 0.150 mg of a medication. If each tablet contains 75 mcg, how many tablets should the patient take? (1 mg = 1000 mcg)

Accepted Answer

$$0.150 	imes \frac{1000}{75} = 2$$ tablets

Question 3

Which of the following is an exact number?

Accepted Answer

The number of eggs in a dozen

Question 4

Convert 2.44 meters to centimeters. (1 m = 100 cm)

Accepted Answer

$$2.44 	imes 100 = 244 cm$$

Question 5

A sample of metal has a mass of 48.0 g and causes the water level in a graduated cylinder to rise from 25.0 mL to 33.0 mL. What is the density of the metal?

Accepted Answer

$$\frac{48.0}{8.0} = 6.0 g/mL$$

Question 6

Which of the following is the correct equality for converting liters to milliliters?

Accepted Answer

$$1 	ext{ L} = 1000 	ext{ mL}$$

Question 7

A person weighs 164 lb. What is their mass in kilograms? (1 kg = 2.20 lb)

Accepted Answer

$$164 	imes \frac{1}{2.20} = 74.5 kg$$

Question 8

Which prefix represents one thousandth (0.001) of a unit?

Accepted Answer

milli-

Question 9

How many minutes are in 1.4 days?

Accepted Answer

$$1.4 	imes 24 	imes 60 = 2.0 	imes 10^3$ minutes

Question 10

A liquid has a density of 1.32 g/mL. What is the volume in mL of a 14.7 g sample?

Accepted Answer

$$\frac{14.7}{1.32} = 11.1 mL$$

Question 11

Which of the following objects will float in water (density = 1.00 g/mL)?

Accepted Answer

Cork (density = 0.26 g/mL)

Question 12

Which of the following is the correct formula for density?

Accepted Answer

$$	ext{Density} = \frac{	ext{mass}}{	ext{volume}}$$

Question 13

If your pace on a treadmill is 65 meters per minute, how many minutes will it take to walk 7.5 kilometers?

Accepted Answer

$$7.5 	imes 10^3$ \div 65 = 120$$ minutes

Question 14

Which of the following is NOT a base SI unit?

Accepted Answer

Quart (qt)

Question 15

A nurse needs to administer 12 grams of cough syrup. If the syrup has a density of 1.20 g/mL and 1 teaspoon is 5.0 mL, how many teaspoons should be given?

Accepted Answer

$$12 \div (1.20 	imes 5.0) = 2.0$$ teaspoons

Question 16

Which of the following is the correct conversion factor for 1 kilogram to pounds?

Accepted Answer

$$1 	ext{ kg} = 2.20 	ext{ lb}$$

Question 17

Which of the following is the correct equality for converting centimeters to inches?

Accepted Answer

$$2.54 	ext{ cm} = 1 	ext{ in.}$$

Chemistry and Measurements: Structured Study Notes for GOB Chemistry

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