Question 1

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

Accepted Answer

$$4.56 	imes 10^7$

Question 2

Convert $$0.000549 g to $$scientific notation.

Accepted Answer

$$5.49 	imes 10$$^{-4}$$\ g

Question 3

How many significant figures are in the measurement $$1.000 mL$$?

Accepted Answer

4

Question 4

A student measures the mass of a rock as $$28.4 g $$and its volume as $$5.10 cm$^3. $$What is the density of the rock, reported with the correct number of significant figures?

Accepted Answer

$$5.57$$\ $$g/cm^3$

Question 5

Which of the following statements about significant digits is TRUE?

Accepted Answer

Zeros after a decimal point and after a significant digit are significant.

Question 6

Round $$0.004791 L to $$two significant figures.

Accepted Answer

$$0.0048$$\ L

Question 7

A sample of aluminum has a mass of $$22.5 g $$and a volume of $$8.29 cm$^3. $$What is its density, reported with the correct number of significant figures?

Accepted Answer

$$2.71$$\ $$g/cm^3$

Question 8

Which of the following is NOT a correct metric prefix and its meaning?

Accepted Answer

mega-: $$10^{-6}$$

Question 9

A block of wood has a density of $$0.85 g/cm$^3. $$Will it float or sink in water (density $$1.00 g/cm$^3$$)?

Accepted Answer

It will float because its density is less than water.

Question 10

Which of the following conversions is correct for $$0.45 g to mg$$?

Accepted Answer

$$450$$\ mg

Question 11

A chemist needs to convert $$6.00 in to cm. $$Using the conversion factor $$2.54 cm$$ $$= 1 in$$, what is the correct answer with proper significant figures?

Accepted Answer

$$15.2$$\ cm

Question 12

When multiplying $$2.38 g by$$ $$0.12 cm$^3$$, how many significant figures should the answer have?

Accepted Answer

2

Question 13

Which of the following is an example of a measurement with infinite significant figures?

Accepted Answer

The number of students in a classroom

Question 14

A sample of iron has a mass of $$185 g $$and a density of $$7.86 g/cm$^3. $$What is its volume, reported with the correct number of significant figures?

Accepted Answer

$$23.5$$\ $$cm^3$

Question 15

Which of the following is the correct way to convert $$533 cm to $$meters?

Accepted Answer

$$533 \div 100 = 5.33$$\ m

Question 16

A utility box has a volume of $$1.5 ft$^3. $$How many cubic inches is this? ($$1 ft$$ $$= 12 in)$$

Accepted Answer

$$2592$$\ $$in^3$

Question 17

Which of the following best describes the difference between mass and weight?

Accepted Answer

Mass is the amount of matter in an object; weight is the force of gravity on that mass.

Question 18

A student adds $$503.9 mL $$and $$200 mL. $$How many decimal places should the answer have?

Accepted Answer

0 decimal places

Question 19

Which of the following is the correct result for $$4.184 cm$$ $$	imes$$ $$2.11 cm$$, reported with the correct number of significant figures?

Accepted Answer

$$8.83$$\ $$cm^2$

Chapter 2: Measurements in Chemistry – Scientific Notation, Significant Figures, and Unit Conversions

Guida di studio - Domande di pratica

Study guide - Flashcard