$$100\,\text{cm} \times \frac{1\,\text{in}}{2.54\,\text{cm}} = 39.37\,\text{in}$$

Question 1

Which of the following is an example of an extensive property?

Accepted Answer

Mass

Question 2

A mixture of sand and salt can be separated by which method?

Accepted Answer

Filtration

Question 3

Which statement best describes a compound?

Accepted Answer

A substance composed of two or more elements in a fixed ratio

Question 4

Which of the following is a physical change?

Accepted Answer

Melting of ice

Question 5

A sample contains only one type of atom. Which classification best fits this sample?

Accepted Answer

Element

Question 6

Which of the following is the correct formula for density?

Accepted Answer

$$D = \frac{m}{V}$$

Question 7

Convert 100 cm to inches using dimensional analysis. ($$1\,	ext{in} = 2.54\,	ext{cm})$$

Accepted Answer

$$100\,	ext{cm} 	imes \frac{1\,	ext{in}}{2.54\,	ext{cm}} = 39.37\,	ext{in}$$

Question 8

Which of the following is a homogeneous mixture?

Accepted Answer

Salt water

Question 9

A student measures the mass of a liquid as 25.0 g and its volume as 10.0 mL. What is the density of the liquid?

Accepted Answer

$$2.5\,	ext{g/mL}$$

Question 10

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

Accepted Answer

Flammability

Question 11

Which SI unit is used to measure temperature?

Accepted Answer

Kelvin

Question 12

What is the correct conversion from Celsius to Kelvin?

Accepted Answer

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

Question 13

Which of the following best describes the Law of Constant Composition?

Accepted Answer

A compound always contains the same proportion of elements by mass

Question 14

A student adds 7.2234 and 3.004. How many significant figures should the answer have?

Accepted Answer

Three

Question 15

Which of the following is the correct formula for kinetic energy?

Accepted Answer

$$E_k = \frac{1}{2}mv^2$

Question 16

Which of the following numbers has three significant figures?

Accepted Answer

0.00340

Question 17

Which separation technique would be most effective for separating colored dyes in ink?

Accepted Answer

Chromatography

Question 18

Which of the following is a derived SI unit?

Accepted Answer

Joule

Question 19

A student multiplies 2.50 by 3.0. How many significant figures should the answer have?

Accepted Answer

Two

Question 20

Which of the following statements about accuracy and precision is correct?

Accepted Answer

Precision refers to how close measurements are to each other

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

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