Q: A nurse records a patient's weight as 164 lb. What is this mass in kilograms? ($$1 \\text{ kg} = 2.20 \\text{ lb})$$

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

Q: A graduated cylinder contains 25.0 mL of water. After adding a metal sample, the volume rises to 33.0 mL. If the mass of the metal is 48.0 g, what is its density in $$\\text{g/cm}^3$$?

$$\\frac{48.0 \\text{ g}}{8.0 \\text{ mL}} = 6.0 \\text{ g/cm}^3$$

Q: Convert 2.44 meters to centimeters.

$$2.44 \\times 100 = 244 \\text{ cm}$$

Q: A patient receives a prescription for 0.150 mg of a drug. If each tablet contains 75 mcg, how many tablets are needed? ($$1 \\text{ mg} = 1000 \\text{ mcg})$$

$$0.150 \\text{ mg} \\times \\frac{1000 \\text{ mcg}}{1 \\text{ mg}} \\times \\frac{1 \\text{ tablet}}{75 \\text{ mcg}} = 2 \\text{ tablets}$$

Q: Which of the following conversion factors is correct for converting meters to millimeters?

$$1 \\text{ m} = 1000 \\text{ mm}$$

Q: A sample of liquid has a mass of 14.7 g and a density of 1.32 g/mL. What is its volume in mL?

$$\\frac{14.7 \\text{ g}}{1.32 \\text{ g/mL}} = 11.1 \\text{ mL}$$

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

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

Q: Which of the following is the correct conversion factor for $$1 \\text{ in} = 2.54 \\text{ cm}$$?

$$\\frac{2.54 \\text{ cm}}{1 \\text{ in}}$$

Q: A cube has sides of 10 cm. What is its volume in liters?

$$10 \\text{ cm} \\times 10 \\text{ cm} \\times 10 \\text{ cm} = 1000 \\text{ cm}^3 = 1 \\text{ L}$$

Question 1

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

Accepted Answer

Kelvin (K)

Question 2

A nurse records a patient's weight as 164 lb. What is this mass in kilograms? ($$1 \text{ kg} = 2.20 \text{ lb})$$

Accepted Answer

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

Question 3

Which of the following numbers has three significant figures?

Accepted Answer

0.00450

Question 4

A graduated cylinder contains 25.0 mL of water. After adding a metal sample, the volume rises to 33.0 mL. If the mass of the metal is 48.0 g, what is its density in $$\text{g/cm}^3$$?

Accepted Answer

$$\frac{48.0 \text{ g}}{8.0 \text{ mL}} = 6.0 \text{ g/cm}^3$$

Question 5

Which of the following is NOT a significant figure in the number 0.00780?

Accepted Answer

The zeros before the 7

Question 6

Convert 2.44 meters to centimeters.

Accepted Answer

$$2.44 \times 100 = 244 \text{ cm}$$

Question 7

Which of the following is the correct scientific notation for 0.0003400?

Accepted Answer

$$3.400 \times 10$$^{-4}$$

Question 8

A patient receives a prescription for 0.150 mg of a drug. If each tablet contains 75 mcg, how many tablets are needed? ($$1 \text{ mg} = 1000 \text{ mcg})$$

Accepted Answer

$$0.150 \text{ mg} \times \frac{1000 \text{ mcg}}{1 \text{ mg}} \times \frac{1 \text{ tablet}}{75 \text{ mcg}} = 2 \text{ tablets}$$

Question 9

Which of the following conversion factors is correct for converting meters to millimeters?

Accepted Answer

$$1 \text{ m} = 1000 \text{ mm}$$

Question 10

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

Accepted Answer

$$\frac{14.7 \text{ g}}{1.32 \text{ g/mL}} = 11.1 \text{ mL}$$

Question 11

Which of the following is the correct rule for determining the number of significant figures in the result of a multiplication or division?

Accepted Answer

The result should have the same number of significant figures as the measurement with the fewest significant figures.

Question 12

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

Accepted Answer

kilogram (kg)

Question 13

A laboratory test result is reported as 0.00450 g. How many significant figures does this value have?

Accepted Answer

3

Question 14

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

Accepted Answer

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

Question 15

A student adds 82.409 mg and 22.0 mg. What is the correct answer with the proper number of significant figures?

Accepted Answer

104.4 mg

Question 16

Which of the following is the correct prefix and symbol for $$10^{-6}$$?

Accepted Answer

micro ($$\mu)$$

Question 17

Which of the following is the correct conversion factor for $$1 \text{ in} = 2.54 \text{ cm}$$?

Accepted Answer

$$\frac{2.54 \text{ cm}}{1 \text{ in}}$$

Question 18

A cube has sides of 10 cm. What is its volume in liters?

Accepted Answer

$$10 \text{ cm} \times 10 \text{ cm} \times 10 \text{ cm} = 1000 \text{ cm}^3 = 1 \text{ L}$$

Question 19

Which of the following is the correct rule for rounding off when the first digit to be dropped is 5 or greater?

Accepted Answer

Increase the last retained digit by 1

Chapter 2: Chemistry and Measurements – Structured Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard