Q: A cube has sides of 10 cm. What is its volume in $$cm^3$$?

$$10 \times 10 \times 10 = 1000\ cm^3$

Q: How many micrometers are in 0.0129 inches? (1 inch = 2.54 cm, 1 cm = 10,000 μm)

$$0.0129 \times 2.54 \times 10,000 = 327.66\ \mu m$$

Question 1

Which of the following best describes the difference between the composition and structure of matter, as illustrated by the images of a deck, a canoe, and a baseball bat all made of wood?

Accepted Answer

Composition refers to the simple components that make up a substance, while structure refers to both the components and their arrangement.

Question 2

A beaker contains sand and water, as shown in the image. Which of the following best classifies this sample of matter?

Accepted Answer

Heterogeneous mixture

Question 3

Which of the following is an example of a pure substance?

Accepted Answer

Gold bar

Question 4

In the particulate diagram showing red (oxygen) and white (hydrogen) spheres, which box represents a compound?

Accepted Answer

The box with pairs of red and white spheres bonded together

Question 5

Which phase change is represented by the transition from solid to gas, as shown in the diagram with dry ice?

Accepted Answer

Sublimation

Question 6

When ice melts into liquid water, what type of change is occurring?

Accepted Answer

Physical change

Question 7

Which of the following is an example of an exothermic process?

Accepted Answer

Firewood burning in a fireplace

Question 8

A reaction between zinc and sulfur produces zinc sulfide and releases heat and light. What type of reaction is this?

Accepted Answer

Exothermic reaction

Question 9

Which of the following best describes why a ball rolls down a hill spontaneously, as shown in the diagram?

Accepted Answer

Systems tend to move toward lower energy states.

Question 10

Which of the following is an example of kinetic energy?

Accepted Answer

A ball rolling down a hill

Question 11

Which of the following is the correct SI unit for measuring temperature?

Accepted Answer

Kelvin (K)

Question 12

Convert 25°C to Kelvin using the appropriate formula.

Accepted Answer

$$K = 25 + 273.15 = 298.15$$

Question 13

A cube has sides of 10 cm. What is its volume in $$cm^3$$?

Accepted Answer

$$10 	imes 10 	imes 10 = 1000\ cm^3$

Question 14

Given the density of water is $$1.00\ g/mL$$, will an object with a density of $$0.85\ g/mL$$ float or sink in water?

Accepted Answer

It will float.

Question 15

Which of the following is a derived SI unit?

Accepted Answer

Liter (L)

Question 16

How many micrometers are in 0.0129 inches? (1 inch = 2.54 cm, 1 cm = 10,000 μm)

Accepted Answer

$$0.0129 	imes 2.54 	imes 10,000 = 327.66\ \mu m$$

Question 17

A sample of mercury has a mass of $$1.213\ kg$$ and a density of $$13.534\ g/mL. $$What is its volume in mL?

Accepted Answer

$$V = \frac{1213\ g}{13.534\ g/mL} = 89.68\ mL$$

Question 18

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 19

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture that is uniform throughout

Question 20

Which of the following is the correct formula for converting Celsius to Fahrenheit?

Accepted Answer

$$^\circ F = \frac{9}{5} ^\circ C + 32$$

Chapter 1: Matter and Measurement – General Chemistry Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard