Q: A patient receives 2.5 teaspoons of medicine. How many milliliters is this dose? (Use $$1 \text{ tsp} \approx 5 \text{ mL})$$

$$2.5 \text{ tsp} \times 5 \text{ mL/tsp} = 12.5 \text{ mL}$$

Q: A nurse needs to convert 1.8 km to miles. (Use $$1 \text{ mi} = 1.6 \text{ km}) $$What is the answer in miles?

$$1.8 \text{ km} \div 1.6 \text{ km/mi} = 1.125 \text{ mi}$$

Q: A solution contains 12 g of salt in 100 g of water. What is the percent concentration of salt?

$$\frac{12}{112} \times 100\% = 10.7\%$$

Q: What is the specific heat of water, and why is it important in the human body?

Water has a specific heat of $$1.00 \text{ cal/g}^\circ\text{C}$$, which helps regulate body temperature.

Question 1

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture in which the composition is uniform throughout, such as brass (copper and zinc atoms).

Question 2

Which element is classified as a metalloid on the periodic table?

Accepted Answer

Silicon (Si)

Question 3

A patient receives 2.5 teaspoons of medicine. How many milliliters is this dose? (Use $$1 	ext{ tsp} \approx 5 	ext{ mL})$$

Accepted Answer

$$2.5 	ext{ tsp} 	imes 5 	ext{ mL/tsp} = 12.5 	ext{ mL}$$

Question 4

Which of the following is a physical change?

Accepted Answer

Melting ice to form liquid water

Question 5

What is the correct scientific notation for the number 0.000537?

Accepted Answer

$$5.37 	imes 10$$^{-4}$$

Question 6

Which property distinguishes a compound from an element?

Accepted Answer

A compound contains two or more types of atoms chemically bonded together.

Question 7

A blood sample contains 88 mg/dL of glucose. If the normal range is 65–99 mg/dL, what does this indicate?

Accepted Answer

The glucose level is within the normal range.

Question 8

Which of the following is NOT a significant figure in the measurement 0.00340?

Accepted Answer

The first two zeros before the 3

Question 9

A nurse needs to convert 1.8 km to miles. (Use $$1 	ext{ mi} = 1.6 	ext{ km}) $$What is the answer in miles?

Accepted Answer

$$1.8 	ext{ km} \div 1.6 	ext{ km/mi} = 1.125 	ext{ mi}$$

Question 10

Which of the following statements about the conservation of mass in a chemical reaction is correct?

Accepted Answer

The total number of atoms of each element remains the same before and after the reaction.

Question 11

A solution contains 12 g of salt in 100 g of water. What is the percent concentration of salt?

Accepted Answer

$$\frac{12}{112} 	imes 100\% = 10.7\%$$

Question 12

Which of the following is a micronutrient essential for human health?

Accepted Answer

Iodine (I)

Question 13

What is the specific heat of water, and why is it important in the human body?

Accepted Answer

Water has a specific heat of $$1.00 	ext{ cal/g}^\circ	ext{C}$$, which helps regulate body temperature.

Question 14

Which of the following best describes the arrangement and movement of particles in a gas?

Accepted Answer

Particles are far apart, disordered, and move rapidly.

Question 15

A medication label states the concentration is 23.6 g/mL. If a patient receives 17.7 mL, what is the mass of medication administered, rounded to the correct number of significant figures?

Accepted Answer

$$23.6 	ext{ g/mL} 	imes 17.7 	ext{ mL} = 417 	ext{ g} ($$rounded to 3 sig figs)

Question 16

Which of the following is an example of a heterogeneous mixture?

Accepted Answer

Vegetable soup

Question 17

A thermometer reads 36.4°C. What is this temperature in Fahrenheit? (Use $$F = \frac{9}{5}C + 32)$$

Accepted Answer

$$F = \frac{9}{5} 	imes 36.4 + 32 = 97.5^\circ	ext{F}$$

Question 18

Which of the following is the correct relationship between milliliters and cubic centimeters?

Accepted Answer

$$1 	ext{ mL} = 1 	ext{ cm}^3$$

Question 19

Which of the following best describes accuracy in a measurement?

Accepted Answer

How close a measurement is to the true value.

Chemistry Basics for Nursing: Matter, Measurement, and Calculations

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