Q: A student wants to convert 10 inches to centimeters. Which conversion factor should be used?

$$1 \text{ in.} = 2.54 \text{ cm}$$

Question 1

Which of the following statements best describes a compound?

Accepted Answer

A compound is a substance that can be decomposed into simpler substances because it is made up of more than one element.

Question 2

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

Accepted Answer

Melting of ice into liquid water.

Question 3

Which property is intensive and can be used to help identify a substance?

Accepted Answer

Density

Question 4

A student separates sand from saltwater using a filter. Which separation technique is being used?

Accepted Answer

Filtration

Question 5

Which of the following is a homogeneous mixture?

Accepted Answer

Air

Question 6

Which equation correctly expresses the relationship between kinetic energy, mass, and velocity?

Accepted Answer

$$KE = \frac{1}{2} m v^2$

Question 7

A sample of water is heated from 25°C to 100°C. Which type of property is being measured?

Accepted Answer

Physical property

Question 8

Which of the following is NOT a base unit in the SI system?

Accepted Answer

Liter (L)

Question 9

Which statement about the Law of Constant Composition is correct?

Accepted Answer

The relative number of atoms of each element in a compound is always the same.

Question 10

A student measures the mass of a sample as 2.2405 g using a balance with a precision of ±0.0001 g. How many significant figures should be reported?

Accepted Answer

5

Question 11

Which separation technique would be most appropriate to separate a solution of ethanol and water?

Accepted Answer

Distillation

Question 12

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 13

Convert 25°C to Kelvin.

Accepted Answer

$$K = 25 + 273.15 = 298.15$$

Question 14

Which of the following is an extensive property?

Accepted Answer

Mass

Question 15

A student wants to convert 10 inches to centimeters. Which conversion factor should be used?

Accepted Answer

$$1 	ext{ in.} = 2.54 	ext{ cm}$$

Question 16

Which of the following is true about the Kelvin temperature scale?

Accepted Answer

Its zero point is absolute zero, the lowest possible temperature.

Question 17

A mixture of ink is separated into its components using a technique that relies on differences in the ability of substances to adhere to a solid surface. Which technique is this?

Accepted Answer

Chromatography

Question 18

Which of the following numbers has three significant figures?

Accepted Answer

0.00340

Question 19

Which of the following best describes a heterogeneous mixture?

Accepted Answer

A mixture in which the composition varies from one part of the sample to another.

Question 20

Which of the following is the correct SI base unit for the amount of substance?

Accepted Answer

Mole (mol)

Introduction to Matter, Energy, and Measurement – General Chemistry Chapter 1 Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard