Q: Which equality is correct for converting centimeters to millimeters?

$$1 \ \text{cm} = 10 \ \text{mm}$$

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

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

Q: Which of the following is a correct conversion factor for the equality $$1 \ \text{L} = 1000 \ \text{mL}$$?

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

Q: How many minutes are in 2.5 days?

$$2.5 \times 24 \times 60 = 3600$$ min

Q: Which of the following is the correct calculation for specific gravity?

$$\text{Specific gravity} = \frac{\text{density of sample}}{\text{density of water}}$$

Question 1

Which of the following is the correct SI unit for measuring mass?

Accepted Answer

kilogram (kg)

Question 2

A nurse needs to administer 500 mg of a medication. How many grams is this?

Accepted Answer

$$0.5 g$$

Question 3

Which of the following numbers has three significant figures?

Accepted Answer

0.00450

Question 4

A patient’s IV bag contains 1.0 L of saline solution. How many milliliters is this?

Accepted Answer

$$1000 mL$$

Question 5

Which equality is correct for converting centimeters to millimeters?

Accepted Answer

$$1 \ 	ext{cm} = 10 \ 	ext{mm}$$

Question 6

A sample of aluminum has a mass of 54.0 g and a volume of 20.0 mL. What is its density?

Accepted Answer

$$2.70 \ 	ext{g/mL}$$

Question 7

Which of the following is an exact number?

Accepted Answer

1 kg = 1000 g

Question 8

A thermometer reads 37 °C. What is this temperature in Kelvin?

Accepted Answer

$$310 \ 	ext{K}$$

Question 9

How many significant figures are in the measurement 0.02030 g?

Accepted Answer

4

Question 10

A patient is prescribed 2.5 dL of a solution. How many milliliters is this?

Accepted Answer

$$250 mL$$

Question 11

Which of the following is the correct formula for density?

Accepted Answer

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

Question 12

A solution has a density of 1.32 g/mL. What is the volume of 19.8 g of this solution?

Accepted Answer

$$15.0 mL$$

Question 13

Which of the following is the correct scientific notation for 0.000560 g with the correct number of significant figures?

Accepted Answer

$$5.60 	imes 10$$^{-4}$$ g

Question 14

A runner completes a 5.0 km race. How many meters did they run?

Accepted Answer

$$5000 m$$

Question 15

Which of the following is a correct conversion factor for the equality $$1 \ 	ext{L} = 1000 \ 	ext{mL}$$?

Accepted Answer

$$\frac{1000 \ 	ext{mL}}{1 \ 	ext{L}}$$

Question 16

A block of ice has a density of 0.92 g/mL. Will it float or sink in water, and why?

Accepted Answer

It will float because its density is less than water.

Question 17

How many minutes are in 2.5 days?

Accepted Answer

$$2.5 	imes 24 	imes 60 = 3600$$ min

Question 18

Which of the following is the correct calculation for specific gravity?

Accepted Answer

$$	ext{Specific gravity} = \frac{	ext{density of sample}}{	ext{density of water}}$$

Question 19

A measurement is recorded as 3.40 × 10² m. How many significant figures does this value have?

Accepted Answer

3

Chemistry and Measurements: Structured Study Notes

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