Q: A scientist needs to convert $$32$$ inches to centimeters. Which conversion factor should be used?

$$1$$ \text{ inch} = 2.54$$ \text{ cm}$$

Q: Which of the following is the correct formula for density?

$$\text{Density} = \frac{\text{Mass}}{\text{Volume}}$$

Question 1

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture in which the composition is uniform throughout.

Question 2

A scientist mixes sand and salt together. Which classification best describes the resulting mixture?

Accepted Answer

Heterogeneous mixture

Question 3

Which of the following is NOT a chemical property?

Accepted Answer

It has a yellow-orange color.

Question 4

Which of the following is an intensive property?

Accepted Answer

Density

Question 5

Which of the following is classified as an extensive property?

Accepted Answer

Chemical energy

Question 6

A cube of silver has a side length of 3.0 cm and a density of 10.5 g/cm$$^3. $$What is its mass in kilograms?

Accepted Answer

$$0.2835 kg$$

Question 7

Which of the following scientific notation values is written correctly?

Accepted Answer

$$5.220 	imes 10^3$

Question 8

If the density of an unknown metal is $$2.14 g/cm$^3$$, express its density in kg/m$$^3.$$

Accepted Answer

$$2140 kg/m$^3$$

Question 9

Which of the following processes is reversible?

Accepted Answer

Melting ice and boiling water

Question 10

A student measures the length of a pencil as $$8.00 cm. $$How many significant figures are in this measurement?

Accepted Answer

3

Question 11

Which SI base unit is used to measure electric current?

Accepted Answer

Ampere (A)

Question 12

Convert $$654 kg to $$grams using metric prefixes.

Accepted Answer

$$6.54 	imes 10^5$ g

Question 13

Which of the following is NOT a physical property?

Accepted Answer

Potassium metal is extremely reactive when placed in water.

Question 14

A solution contains $$1.5 	imes 10^3$ mL. What is the volume in liters?

Accepted Answer

$$1.5 L$$

Question 15

Which of the following statements about mixtures is true?

Accepted Answer

Mixtures can be separated by physical means.

Question 16

A scientist needs to convert $$32$$ inches to centimeters. Which conversion factor should be used?

Accepted Answer

$$1$$ 	ext{ inch} = 2.54$$ 	ext{ cm}$$

Question 17

Which of the following is the correct formula for density?

Accepted Answer

$$	ext{Density} = \frac{	ext{Mass}}{	ext{Volume}}$$

Question 18

A sample of copper with a density of $$8.96 g/cm$^3$$ has a diameter of $$0.32 mm. If $$the mass is $$21.7 mg$$, how long is the wire in cm? (Assume the wire is a cylinder.)

Accepted Answer

$$30.0 cm$$

Question 19

Which of the following temperature conversions is correct?

Accepted Answer

$$K = ^\circ C + 273$$

Intro to General Chemistry: Foundational Concepts and Measurements

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