Question 1

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture in which the composition is uniform throughout and the different parts are not visible.

Question 2

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

Accepted Answer

Melting a piece of gold.

Question 3

A sample of titanium (Ti) with a mass of 16 g is heated from $$36.0\ ^\circ\mathrm{C} to$$ $$41.3\ ^\circ\mathrm{C}. If $$the specific heat of Ti is $$0.125\ \mathrm{cal}/(\mathrm{g}\ ^\circ\mathrm{C})$$, how many calories of heat are required?

Accepted Answer

$$10.6\ \mathrm{cal}$$

Question 4

Which of the following statements about the Kelvin temperature scale is FALSE?

Accepted Answer

Zero Kelvin represents the freezing point of water.

Question 5

Convert $$37.22\ ^\circ\mathrm{C} to $$Kelvin.

Accepted Answer

$$310.4\ \mathrm{K}$$

Question 6

Which of the following is a chemical property?

Accepted Answer

Ability to react with oxygen

Question 7

A cup of whole milk contains 13 g of carbohydrate, 9 g of fat, and 9 g of protein. Using the typical energy values (carbohydrate: $$4\ \mathrm{kcal/g}$$, fat: $$9\ \mathrm{kcal/g}$$, protein: $$4\ \mathrm{kcal/g}$$), how many kilocalories does the cup of milk contain?

Accepted Answer

$$169\ \mathrm{kcal}$$

Question 8

Which of the following is a pure substance?

Accepted Answer

Helium

Question 9

How many calories are obtained from a scoop of butter if it provides $$150.\ \mathrm{J} of $$energy when metabolized? ($$1\ \mathrm{cal} = 4.184\ \mathrm{J})$$

Accepted Answer

$$35.9\ \mathrm{cal}$$

Question 10

Which of the following best describes potential energy?

Accepted Answer

Energy based on position or chemical composition

Question 11

Which of the following is NOT a property of gases?

Accepted Answer

Have particles that are close together in a fixed arrangement

Question 12

A sports trainer uses an ice bag containing $$260.\ \mathrm{g} of $$ice at $$0\ ^\circ\mathrm{C}. $$How much heat, in kilojoules, will be absorbed when all the ice melts? ($$\Delta H_{	ext{fusion}} = 334\ \mathrm{J/g})$$

Accepted Answer

$$77.8\ \mathrm{kJ}$$

Question 13

Which of the following is a heterogeneous mixture?

Accepted Answer

Almonds in a bowl

Question 14

Which equation correctly converts a temperature from Fahrenheit to Celsius?

Accepted Answer

$$T_C = \dfrac{T_F - 32}{1.8}$$

Question 15

Which of the following is a physical property?

Accepted Answer

Color

Question 16

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements always combined in the same proportion

Question 17

Which of the following is an example of kinetic energy?

Accepted Answer

Water flowing over a dam

Question 18

Which of the following is TRUE about physical changes?

Accepted Answer

They may involve a change in state or shape, but not in chemical composition.

Question 19

What is the amount of heat required to melt $$32.0\ \mathrm{g} of $$ice at $$0\ ^\circ\mathrm{C}$$? ($$\Delta H_{	ext{fusion}} = 334\ \mathrm{J/g})$$

Accepted Answer

$$10,688\ \mathrm{J}$$

Question 20

Which of the following best describes the difference between a mixture and a compound?

Accepted Answer

A mixture can be separated by physical methods, while a compound can only be separated by chemical methods.

Chapter 3 – Matter and Energy: Study Notes

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