$1\ \mathrm{m}^3 = 1 \times 10^6\ \mathrm{cm}^3$

$\frac{1\ \mathrm{kg}}{1000\ \mathrm{g}} \times \frac{1\ \mathrm{mL}}{0.792\ \mathrm{g}}$

Question 1

Which of the following numbers contains three significant figures?

Accepted Answer

0.0200

Question 2

A student measures the mass of a sample as 0.792 g and its volume as 1.00 mL. What is the density of the sample in $\mathrm{g/mL}$?

Accepted Answer

$0.792\ \mathrm{g/mL}$

Question 3

Which of the following is the correct conversion from $25\ ^\circ\mathrm{C}$ to Kelvin?

Accepted Answer

$298\ \mathrm{K}$

Question 4

Which prefix represents a multiplier of $10^{-6}$?

Accepted Answer

micro

Question 5

A measurement is recorded as $0.035\ \mathrm{kg}$. How many significant figures does this value have?

Accepted Answer

3

Question 6

Which of the following best describes the term 'accuracy' in scientific measurement?

Accepted Answer

How close a measured value is to the true value

Question 7

A student needs to convert $657\ \mathrm{cm}^3$ to $\mathrm{m}^3$. Which conversion factor should be used?

Accepted Answer

$1\ \mathrm{m}^3 = 1 	imes 10^6\ \mathrm{cm}^3$

Question 8

If a value is reported as $0.00450$, how many significant figures does it have?

Accepted Answer

3

Question 9

Which of the following is the correct formula for density?

Accepted Answer

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

Question 10

A student calculates the sum $12.34 + 1.3 + 0.604$. How many significant figures should the answer have?

Accepted Answer

2

Question 11

Which of the following statements about precision is correct?

Accepted Answer

Precision refers to how close repeated measurements are to each other.

Question 12

A sample has a mass of $35.0\ \mathrm{g}$ and a volume of $44.0\ \mathrm{mL}$. What is its density in $\mathrm{g/mL}$?

Accepted Answer

$0.795\ \mathrm{g/mL}$

Question 13

Which of the following is NOT a standard SI unit?

Accepted Answer

liter (L)

Question 14

When multiplying or dividing measurements, the answer should be reported with:

Accepted Answer

The same number of significant figures as the measurement with the fewest significant figures

Question 15

Which conversion factor would you use to convert $0.035\ \mathrm{kg}$ of methanol to mL, given the density is $0.792\ \mathrm{g/mL}$?

Accepted Answer

$\frac{1\ \mathrm{kg}}{1000\ \mathrm{g}} 	imes \frac{1\ \mathrm{mL}}{0.792\ \mathrm{g}}$

Question 16

Which of the following numbers is expressed in scientific notation with the correct number of significant figures for the value $0.0150$?

Accepted Answer

$1.50 	imes 10^{-2}$

Question 17

Which of the following is the correct definition of a conversion factor?

Accepted Answer

A ratio that expresses how many of one unit are equal to another unit

Question 18

A temperature change of $10\ \mathrm{K}$ is equivalent to what change in $^\circ\mathrm{C}$?

Accepted Answer

$10\ ^\circ\mathrm{C}$

Question 19

Which of the following statements about zeros in significant figures is correct?

Accepted Answer

Zeros to the right of a nonzero digit in a measurement are significant if there is a decimal point.

Chapter E: Essentials—Units, Measurement, and Problem Solving (General Chemistry Study Notes)

Study Guide - Practice Questions