Q: A medication contains 40. mg of propranolol in 1 tablet. Which of the following is a correct conversion factor for this relationship?

$$\frac{1 \ \text{tablet}}{40. \ \text{mg}}$$

Q: A solution contains 1.9% omega-3 fatty acids by mass. Which conversion factor would you use to find the mass of omega-3 in a 100 g sample?

$$\frac{1.9 \ \text{g omega-3}}{100 \ \text{g solution}}$$

Question 1

Which of the following is the correct SI unit for measuring the volume of a liquid medication administered intravenously?

Accepted Answer

liter (L)

Question 2

A nurse measures a patient's pulse for 30 seconds and records 38 beats. What is the patient's pulse rate in beats per minute?

Accepted Answer

$$76 \ 	ext{beats/min}$$

Question 3

How many significant figures are in the measurement 0.00243 m?

Accepted Answer

3

Question 4

Which of the following numbers is an exact number?

Accepted Answer

3 bags

Question 5

Round 35.7823 m to three significant figures.

Accepted Answer

$$35.8 \ 	ext{m}$$

Question 6

Calculate $$4.2 	imes 5.0$$ and express the answer with the correct number of significant figures.

Accepted Answer

$$21$$

Question 7

Perform the following addition and round to the correct number of decimal places: $$104 + 7.8 + 40$$

Accepted Answer

$$150$$

Question 8

How many millimeters are in 1 centimeter?

Accepted Answer

$$10 \ 	ext{mm}$$

Question 9

A medication contains 40. mg of propranolol in 1 tablet. Which of the following is a correct conversion factor for this relationship?

Accepted Answer

$$\frac{1 \ 	ext{tablet}}{40. \ 	ext{mg}}$$

Question 10

A patient weighs 164 lb. What is their mass in kilograms? (Use $$1 \ 	ext{kg} = 2.20 \ 	ext{lb})$$

Accepted Answer

$$74.5 \ 	ext{kg}$$

Question 11

A doctor prescribes 0.150 mg of Synthroid. If each tablet contains 75 mcg, how many tablets are needed? (1 mg = 1000 mcg)

Accepted Answer

2 tablets

Question 12

A person has 16% body fat by mass and weighs 155 lb. What is the mass of body fat in kilograms? (Use $$1 \ 	ext{kg} = 2.20 \ 	ext{lb})$$

Accepted Answer

$$11 \ 	ext{kg}$$

Question 13

Calculate the density of a sample if its mass is 0.258 g and its volume is 0.215 mL.

Accepted Answer

$$1.20 \ 	ext{g/mL}$$

Question 14

Deshawn has a blood volume of 5.9 qt. If the density of blood is $$1.06 \ 	ext{g/mL}$$ and $$1 \ 	ext{qt} = 946 \ 	ext{mL}$$, what is the mass of his blood in grams?

Accepted Answer

$$5900 \ 	ext{g}$$

Question 15

Which of the following statements about significant figures is TRUE?

Accepted Answer

All digits in the coefficient of a number written in scientific notation are significant.

Question 16

Which of the following is a measured number?

Accepted Answer

0.170 L

Question 17

When multiplying or dividing measured numbers, the final answer should be rounded to:

Accepted Answer

The same number of significant figures as the number with the fewest significant figures.

Question 18

A solution contains 1.9% omega-3 fatty acids by mass. Which conversion factor would you use to find the mass of omega-3 in a 100 g sample?

Accepted Answer

$$\frac{1.9 \ 	ext{g omega-3}}{100 \ 	ext{g solution}}$$

Chapter 2 Study Guidance: Chemistry and Measurements (GOB Chemistry)

Guida di studio - Domande di pratica

Study guide - Flashcard