Q: A nurse needs to administer a medication with a dosage of 500 mg per kg body weight. If a patient weighs 70 kg, how many grams of medication should be given?

$$500 \times 70 = 35,000 mg$$ = $$35$$ grams

Q: A box measures $$10.0 \ \mathrm{cm} \times 5.0 \ \mathrm{cm} \times 2.0 \ \mathrm{cm}. $$What is its volume in $$\mathrm{cm}^3$$?

$$10.0 \times 5.0 \times 2.0 = 100 \ \mathrm{cm}^3$$

Q: Which of the following is the correct dimensional analysis setup to convert 5.4 minutes to seconds?

$$5.4 \ \mathrm{minutes} \times \frac{60 \ \mathrm{seconds}}{1 \ \mathrm{minute}}$$

Question 1

Which of the following best defines 'matter' as used in chemistry?

Accepted Answer

Anything that occupies space and has mass.

Question 2

Which of the following is an example of an exact number in chemistry?

Accepted Answer

There are 1000 mL in 1 L.

Question 3

A nurse needs to administer a medication with a dosage of 500 mg per kg body weight. If a patient weighs 70 kg, how many grams of medication should be given?

Accepted Answer

$$500 	imes 70 = 35,000 mg$$ = $$35$$ grams

Question 4

Which of the following is the correct SI base unit for temperature?

Accepted Answer

Kelvin (K)

Question 5

A sample of gasoline has a density of $$0.718 \ \mathrm{g/mL}. $$What is the volume in liters of $$454 \ \mathrm{g} of $$gasoline?

Accepted Answer

$$454 \div 0.718 = 632.3 mL$$, which is $$0.632 L$$

Question 6

Which of the following is the correct formula for converting Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 7

A patient’s IV bag contains $$500 \ \mathrm{mL} of $$saline. How many liters is this?

Accepted Answer

$$500 \div 1000 = 0.5 L$$

Question 8

Which of the following statements about significant figures is TRUE?

Accepted Answer

Significant figures include all certain digits plus one estimated digit.

Question 9

A box measures $$10.0 \ \mathrm{cm} 	imes 5.0 \ \mathrm{cm} 	imes 2.0 \ \mathrm{cm}. $$What is its volume in $$\mathrm{cm}^3$$?

Accepted Answer

$$10.0 	imes 5.0 	imes 2.0 = 100 \ \mathrm{cm}^3$$

Question 10

Which of the following is a derived SI unit?

Accepted Answer

Liter (L)

Question 11

A nurse needs to convert a patient’s weight from pounds to kilograms. If the patient weighs 154 pounds, and $$1 \ \mathrm{kg} = 2.2 \ \mathrm{lb}$$, what is the patient’s weight in kilograms?

Accepted Answer

$$154 \div 2.2 = 70 kg$$

Question 12

Which of the following is the correct relationship for the metric prefix 'milli-'?

Accepted Answer

$$1 \ \mathrm{mL} = 0.001 \ \mathrm{L}$$

Question 13

A thermometer reads $$27^\circ \mathrm{C}. $$What is this temperature in Kelvin?

Accepted Answer

$$27 + 273.15 = 300.15 K$$

Question 14

Which of the following is NOT a base SI unit?

Accepted Answer

Liter (L)

Question 15

A solution has a density of $$1.25 \ \mathrm{g/mL}. $$What is the mass of $$200 \ \mathrm{mL} of $$this solution?

Accepted Answer

$$1.25 	imes 200 = 250 g$$

Question 16

Which of the following is the correct dimensional analysis setup to convert 5.4 minutes to seconds?

Accepted Answer

$$5.4 \ \mathrm{minutes} 	imes \frac{60 \ \mathrm{seconds}}{1 \ \mathrm{minute}}$$

Question 17

Which of the following is a correct statement about conversion factors?

Accepted Answer

Conversion factors are fractions with equal numerator and denominator, but different units.

Question 18

A nurse needs to administer 250 mg of a drug. The available tablets are 0.5 g each. How many tablets should be given?

Accepted Answer

0.5 tablets

Question 19

Which of the following is the correct formula for the volume of a rectangular box?

Accepted Answer

$$V = h 	imes w 	imes l$$

Introduction to Chemistry, Measurement, and Unit Conversions

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