Q: Which of the following is the correct conversion for 2.54 cm to inches?

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

Q: Which of the following is the correct formula for calculating the slope of a line on a graph?

$\text{slope} = \dfrac{y_2 - y_1}{x_2 - x_1}$

Q: Which of the following is the correct conversion factor for volume?

$1 \text{ L} = 1000 \text{ mL}$

Q: A student needs to convert 1.5 yards to centimeters. Which conversion factor should be used?

$1 \text{ yd} = 91.4 \text{ cm}$

Question 1

Which of the following best describes a chemical reaction?

Accepted Answer

A process in which substances interact to form new substances with different properties.

Question 2

Which statement about the scientific method is correct?

Accepted Answer

A hypothesis is a possible explanation that can be tested by experiments.

Question 3

A student measures the mass of a sample as 0.00450 kg. How many significant figures are in this measurement?

Accepted Answer

3

Question 4

Which of the following is the correct conversion for 2.54 cm to inches?

Accepted Answer

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

Question 5

Which of the following is NOT a base SI unit?

Accepted Answer

gram (g)

Question 6

A temperature of $25^{\circ}	ext{C}$ is equivalent to what temperature in Kelvin?

Accepted Answer

$298.15 	ext{ K}$

Question 7

Which of the following numbers is correctly written in scientific notation?

Accepted Answer

$0.00056 = 5.6 	imes 10^{-4}$

Question 8

A graph shows a straight line passing through the origin. What type of relationship does this indicate between the variables?

Accepted Answer

Direct relationship

Question 9

Which of the following is the correct formula for calculating the slope of a line on a graph?

Accepted Answer

$	ext{slope} = \dfrac{y_2 - y_1}{x_2 - x_1}$

Question 10

Which prefix represents $10^{-3}$ in the metric system?

Accepted Answer

milli-

Question 11

If a sample has a mass of 454 g, what is its mass in pounds (lb)?

Accepted Answer

$1 	ext{ lb}$

Question 12

Which of the following statements about significant figures is TRUE?

Accepted Answer

Zeros at the end of a number with a decimal point are significant.

Question 13

A student reports a measurement as 3.00 cm. How many significant figures does this value have?

Accepted Answer

3

Question 14

Which of the following is the correct conversion factor for volume?

Accepted Answer

$1 	ext{ L} = 1000 	ext{ mL}$

Question 15

Which of the following best describes 'composition' in chemistry?

Accepted Answer

What a substance is made of.

Question 16

Which temperature is considered 'absolute zero' in Kelvin?

Accepted Answer

$0 	ext{ K}$

Question 17

A solution contains 5% red balls and 95% green balls. How many red balls are present in a sample of 200 balls?

Accepted Answer

10

Question 18

Which of the following is the correct way to express 44,000 in scientific notation with two significant figures?

Accepted Answer

$4.4 	imes 10^{4}$

Question 19

Which of the following is a correct statement about matter?

Accepted Answer

Matter is anything that has mass and occupies space.

Question 20

A student needs to convert 1.5 yards to centimeters. Which conversion factor should be used?

Accepted Answer

$1 	ext{ yd} = 91.4 	ext{ cm}$

Chapter 1: Chemistry in Our Lives – GOB Chemistry Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards