Q: Convert $$1.15 \times 10^8$\ \mathrm{cm}^3 to$$ $$\mathrm{km}^3.$$

$$1.15 \times 10$$^{-10}$$\ \mathrm{km}^3$$

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

$$\text{Density} = \dfrac{\text{mass}}{\text{volume}}$$

Q: Which of the following is the correct conversion for $$83\ \mu\mathrm{m} to $$meters?

$$8.3 \times 10$$^{-6}$$\ \mathrm{m}$$

Question 1

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements that are chemically bonded together.

Question 2

Which of the following is a chemical change?

Accepted Answer

Burning wood in a campfire.

Question 3

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

Accepted Answer

Coffee

Question 4

Which of the following is a physical property?

Accepted Answer

Mercury is a silvery liquid at 25ºC.

Question 5

Which of the following is NOT an intensive property?

Accepted Answer

Milligrams

Question 6

Which of the following is an extensive property?

Accepted Answer

Moles

Question 7

A student measures the length of a pencil as shown in the image. What is the correct measurement to the proper number of significant figures?

Accepted Answer

$$2.6\ \mathrm{cm}$$

Question 8

Which of the following calculations is reported to the correct number of significant figures? $$(3.16) 	imes (0.003027) 	imes (5.7 	imes 10^3$)$$

Accepted Answer

$$54.6$$

Question 9

Convert $$1.15 	imes 10^8$\ \mathrm{cm}^3 to$$ $$\mathrm{km}^3.$$

Accepted Answer

$$1.15 	imes 10$$^{-10}$$\ \mathrm{km}^3$$

Question 10

Which of the following represents a reversible change?

Accepted Answer

Melting a chocolate bar then re-solidifying it in the freezer.

Question 11

A piece of unknown solid weighs $$0.23\ \mathrm{lbs}. $$When placed in a beaker, the water level rises from $$200\ \mathrm{mL} to$$ $$260\ \mathrm{mL}. $$What is the density of the solid in $$\mathrm{g/mL}$$? (1 lb = 453.6 g)

Accepted Answer

$$1.75\ \mathrm{g/mL}$$

Question 12

Which of the following is a chemical property of hydrogen gas?

Accepted Answer

It reacts explosively with oxygen gas.

Question 13

Which of the following is the correct formula for density?

Accepted Answer

$$	ext{Density} = \dfrac{	ext{mass}}{	ext{volume}}$$

Question 14

A copper wire (density $$= 8.96\ \mathrm{g/cm}^3) $$has a diameter of $$0.32\ \mathrm{mm}. If a $$sample of this wire has a mass of $$21.7\ \mathrm{g}$$, how long is the wire? (Use $$V = \pi r^2$ h)$$

Accepted Answer

$$3000\ \mathrm{cm}$$

Question 15

Which of the following is NOT a physical property?

Accepted Answer

An iron bar rusts.

Question 16

Which of the following is the correct SI base unit for mass?

Accepted Answer

kilogram (kg)

Question 17

A laboratory room measures $$10\ \mathrm{m} by$$ $$15\ \mathrm{m}. $$What is the area in $$\mathrm{m}^2$$?

Accepted Answer

$$150\ \mathrm{m}^2$$

Question 18

Which of the following is the correct conversion for $$83\ \mu\mathrm{m} to $$meters?

Accepted Answer

$$8.3 	imes 10$$^{-6}$$\ \mathrm{m}$$

Question 19

Which of the following is the correct temperature conversion formula from Celsius to Kelvin?

Accepted Answer

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

Matter, Measurement, and Problem Solving: General Chemistry Study Guide

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