$$0.00056 = 5.6 \times 10$$^{-4}$$

$$1 \text{ cm} = 0.01 \text{ m}$$

$$\text{Density} = \frac{8.50}{2.50} = 3.40 \text{ g/mL}$$

Question 1

Which of the following is the correct metric prefix for one-thousandth ($$10^{-3}) of a $$unit?

Accepted Answer

milli-

Question 2

A patient’s mass is measured as 154 pounds. What is this mass in kilograms? (1 kg = 2.205 lb)

Accepted Answer

$$154 \div 2.205 = 69.8 kg$$

Question 3

Which of the following numbers is correctly written in scientific notation?

Accepted Answer

$$0.00056 = 5.6 	imes 10$$^{-4}$$

Question 4

How many significant figures are in the measurement 0.00450 g?

Accepted Answer

3

Question 5

Which of the following is a correct conversion factor to convert from centimeters to meters?

Accepted Answer

$$1 	ext{ cm} = 0.01 	ext{ m}$$

Question 6

A sample has a mass of 8.50 g and a volume of 2.50 mL. What is its density?

Accepted Answer

$$	ext{Density} = \frac{8.50}{2.50} = 3.40 	ext{ g/mL}$$

Question 7

Which of the following is NOT a base unit in the metric system?

Accepted Answer

inch

Question 8

A nurse needs to administer 0.75 L of saline. How many milliliters is this?

Accepted Answer

$$0.75 	imes 1000 = 750 mL$$

Question 9

Which of the following measurements contains three significant figures?

Accepted Answer

0.030

Question 10

A block has a density of $$2.70 	ext{ g/cm}^3$$ and a volume of $$15.0 	ext{ cm}^3. $$What is its mass?

Accepted Answer

$$2.70 	imes 15.0 = 40.5 g$$

Question 11

Which of the following is the correct way to round the number 0.006789 to two significant figures?

Accepted Answer

0.0068

Question 12

A student measures the temperature as 37°C. What is this temperature in Kelvin? ($$K = ^\circ C + 273.15)$$

Accepted Answer

$$37 + 273.15 = 310.15 K$$

Question 13

Which of the following is a correct strategy for solving a conversion factor problem?

Accepted Answer

Identify the given information, design a plan, set up the problem with units, and perform the calculation.

Question 14

A liquid has a density of $$1.20 	ext{ g/mL}. $$What is the volume of 18.0 g of this liquid?

Accepted Answer

$$\frac{18.0}{1.20} = 15.0 mL$$

Question 15

Which of the following is the correct scientific notation for 5,600,000?

Accepted Answer

$$5.6 	imes 10$$^{6}$$

Question 16

A solution has a specific gravity of 1.05. What is its density in g/mL?

Accepted Answer

1.05 g/mL

Question 17

Which of the following is a non-significant zero in the measurement 0.04020 g?

Accepted Answer

The first two zeros (0.04)

Question 18

A medication is prescribed as 250 mg. How many grams is this? ($$1 	ext{ g} = 1000 	ext{ mg})$$

Accepted Answer

$$250 \div 1000 = 0.25 g$$

Question 19

Which of the following is the correct order of metric prefixes from largest to smallest?

Accepted Answer

kilo-, hecto-, deca-, deci-, centi-, milli-

Fundamental Concepts in GOB Chemistry: Measurement, Notation, and Problem Solving

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