Question 1

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

Accepted Answer

Rocky road ice cream

Question 2

Which statement best describes a compound?

Accepted Answer

A pure substance made of two or more elements chemically joined together

Question 3

Which of the following elements is considered a macronutrient essential for human health?

Accepted Answer

Potassium

Question 4

A copper penny turns green after being exposed to air for a long time. This is an example of:

Accepted Answer

A chemical change

Question 5

Which of the following chemical equations is balanced?

Accepted Answer

$$\mathrm{2H_2 + O_2$ \rightarrow 2H_2O}$$

Question 6

Convert 450 milligrams (mg) to grams (g).

Accepted Answer

$$0.45\ \mathrm{g}$$

Question 7

How many kilometers are in 12,500 centimeters?

Accepted Answer

Question 8

Which of the following numbers has three significant figures?

Accepted Answer

0.00340

Question 9

Round the number 2.165 to the hundredths place.

Accepted Answer

2.17

Question 10

Which of the following is the correct scientific notation for 0.00056?

Accepted Answer

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

Question 11

A patient’s body temperature is measured at 39.0 °C. What is this temperature in Fahrenheit?

Accepted Answer

$$102.2\ ^\circ\mathrm{F}$$

Question 12

Which formula is used to convert Celsius to Kelvin?

Accepted Answer

$$K = ^\circ\mathrm{C} + 273$$

Question 13

Which of the following statements about density is correct?

Accepted Answer

Density is the ratio of mass to volume.

Question 14

A liquid sample has a density of $$0.85\ \mathrm{g/mL}. $$What is its specific gravity?

Accepted Answer

$$0.85$$

Question 15

Which of the following substances has the highest specific heat?

Accepted Answer

Water

Question 16

Which of the following is NOT a correct statement about the states of matter?

Accepted Answer

Gases have a definite shape and volume.

Question 17

A medication is prescribed at 0.5 gtt/mL. If a patient receives 10 mL, how many drops are administered?

Accepted Answer

5 drops

Question 18

Which of the following is an example of an exact number?

Accepted Answer

100 cm = 1 m

Question 19

Which of the following best describes the difference between accuracy and precision?

Accepted Answer

Accuracy is how close measurements are to the true value; precision is how close measurements are to each other.

Question 20

A nutrition label states that a serving contains 8 g of protein and the daily value is 50 g. What percent daily value does one serving provide?

Accepted Answer

$$16\%$$

CH117D: Introduction to General, Organic, and Biological Chemistry – Chapter 1 Study Notes

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