$$654 \times 10$$^{3}$$\ \mathrm{g} = 654,000\ \mathrm{g}$$

$$V = \pi r^2$ h = \pi \times (2.0\ \mathrm{cm})^2$ \times 5.0\ \mathrm{cm} = 62.8\ \mathrm{cm}^3$$

Question 1

Which of the following is an example of a chemical change?

Accepted Answer

Burning wood in a campfire

Question 2

A student measures the mass of a metal cube as 80.0 g and each side as 2.00 cm. What is the density of the cube?

Accepted Answer

$$\frac{80.0\ \mathrm{g}}{8.00\ \mathrm{cm}^3} = 10.0\ \mathrm{g/cm}^3$$

Question 3

Which property is intensive?

Accepted Answer

Density

Question 4

A sample of water is heated from 25°C to 100°C. Which type of change is this?

Accepted Answer

Physical change

Question 5

Which of the following best describes a homogeneous mixture?

Accepted Answer

Salt dissolved in water

Question 6

Convert 654 kg to grams using metric prefixes.

Accepted Answer

$$654 	imes 10$$^{3}$$\ \mathrm{g} = 654,000\ \mathrm{g}$$

Question 7

Which of the following is a pure substance?

Accepted Answer

Gold

Question 8

A student records the following measurements: 12.30 g, 0.0045 g, and 1.200 g. How many significant figures are in each measurement, respectively?

Accepted Answer

4, 2, 4

Question 9

Which of the following is the correct formula to convert Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 10

A graduated cylinder contains 200 mL of water. After a metal object is submerged, the water level rises to 265 mL. What is the volume of the object?

Accepted Answer

65 mL

Question 11

Which of the following is an extensive property?

Accepted Answer

Mass

Question 12

A compound is defined as:

Accepted Answer

A pure substance made of two or more types of atoms chemically bonded

Question 13

Which SI base unit is used to measure the amount of substance?

Accepted Answer

Mole (mol)

Question 14

A student multiplies 2.5 cm by 3.42 cm. How many significant figures should the answer have?

Accepted Answer

2

Question 15

Which of the following is the correct scientific notation for 0.00000668?

Accepted Answer

$$6.68 	imes 10$$^{-6}$$

Question 16

A student wants to convert 5.0 inches to centimeters. Which conversion factor should be used?

Accepted Answer

$$1\ \mathrm{in} = 2.54\ \mathrm{cm}$$

Question 17

Which of the following is a physical property?

Accepted Answer

Melting point

Question 18

A student adds 1.25 g and 2.3 g. How many decimal places should the answer have?

Accepted Answer

1

Question 19

Which of the following is a heterogeneous mixture?

Accepted Answer

Salad

Question 20

A cylinder has a radius of 2.0 cm and a height of 5.0 cm. What is its volume?

Accepted Answer

$$V = \pi r^2$ h = \pi 	imes (2.0\ \mathrm{cm})^2$ 	imes 5.0\ \mathrm{cm} = 62.8\ \mathrm{cm}^3$$

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Study Guide - Practice Questions