Question 1

A patient receives a medication dose of 250 mg. How many micrograms ($$\mu g) is $$this?

Accepted Answer

$$250,000\ \mu g$$

Question 2

A laboratory sample has a mass of 0.75 kg. What is this mass in grams?

Accepted Answer

$$750\ g$$

Question 3

A gas occupies $$44.8\ L at $$STP. How many moles of gas are present?

Accepted Answer

$$2\ mol$$

Question 4

A solution has a density of $$1.25\ g/mL$$ and a volume of $$200\ mL. $$What is its mass?

Accepted Answer

$$250\ g$$

Question 5

How many milliliters are in $$2.5\ L$$?

Accepted Answer

$$2,500\ mL$$

Question 6

A pressure reading in a hospital is $$570\ mm\ Hg. $$What is this pressure in atmospheres?

Accepted Answer

$$0.75\ atm$$

Question 7

A food item contains $$300\ Cal. $$How many Joules is this?

Accepted Answer

$$1,255,200\ J$$

Question 8

A sample contains $$3.01 	imes 10$$^{23}$$ molecules. How many moles does this represent?

Accepted Answer

$$0.5\ mol$$

Question 9

A nurse needs to administer $$0.5\ L of $$saline. How many cubic centimeters ($$cm^3) is $$this?

Accepted Answer

$$500\ cm^3$

Question 10

A sample of gas at STP occupies $$11.2\ L. $$How many molecules are present?

Accepted Answer

$$3.01 	imes 10$$^{23}$$

Question 11

A patient’s blood sample has a mass of $$4.5\ g$$ and a volume of $$3.0\ mL. $$What is the density?

Accepted Answer

$$1.5\ g/mL$$

Question 12

A medication is prescribed as $$0.25\ g. $$How many milligrams is this?

Accepted Answer

$$250\ mg$$

Question 13

A pressure gauge reads $$1,520\ torr. $$What is this pressure in atmospheres?

Accepted Answer

$$2\ atm$$

Question 14

A solution contains $$0.005\ kg of $$solute. How many milligrams is this?

Accepted Answer

$$5,000\ mg$$

Question 15

A sample of oxygen gas at STP has a volume of $$67.2\ L. $$How many moles of oxygen are present?

Accepted Answer

$$3\ mol$$

Question 16

A patient receives $$0.75\ L of IV $$fluid. How many milliliters is this?

Accepted Answer

$$750\ mL$$

Question 17

A sample has a mass of $$2,000,000\ \mu g. $$What is this mass in grams?

Accepted Answer

$$2\ g$$

Question 18

A food contains $$150\ kcal. $$How many calories is this?

Accepted Answer

$$150,000\ cal$$

Question 19

A sample of gas at STP contains $$6.02 	imes 10$$^{23}$$ molecules. What is its volume?

Accepted Answer

$$22.4\ L$$

Question 20

A solution has a density of $$0.80\ g/mL$$ and a mass of $$160\ g. $$What is its volume?

Accepted Answer

$$200\ mL$$

Unit Conversion and Fundamental Quantities in Chemistry

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