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 numbers is correctly written in scientific notation?

$$0.00056 = 5.6 \times 10$$^{-4}$$

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

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드