Q: Which of the following is the correct formula for density?

$\text{Density} = \frac{\text{Mass}}{\text{Volume}}$

Question 1

Which of the following is the correct SI base unit and symbol for measuring temperature?

Accepted Answer

Kelvin (K)

Question 2

A basketball player stands about 2 meters tall. If you measure his height in centimeters, what is the correct conversion?

Accepted Answer

$2 	imes 10^2$ cm

Question 3

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

Accepted Answer

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

Question 4

A student measures the mass of a nickel as 5.00 g. What is this mass in kilograms?

Accepted Answer

$5.00 	imes 10^{-3}$ kg

Question 5

Which of the following is NOT a standard SI base unit?

Accepted Answer

Liter

Question 6

The Empire State Building is 443 meters tall. How many kilometers is this?

Accepted Answer

$0.443$ km

Question 7

Which prefix multiplier represents $10^{-3}$?

Accepted Answer

Milli-

Question 8

A sample has a mass of 250 g and a volume of 50.0 mL. What is its density in $g/mL$?

Accepted Answer

$5.0$ $g/mL$

Question 9

Which of the following best describes accuracy in scientific measurement?

Accepted Answer

Obtaining results close to the true value

Question 10

A scientist measures the mass of a sample three times and gets 2.10 g, 2.11 g, and 2.09 g. The true mass is 2.50 g. Which statement is correct?

Accepted Answer

The measurements are precise but not accurate.

Question 11

Which of the following is the correct formula for density?

Accepted Answer

$	ext{Density} = \frac{	ext{Mass}}{	ext{Volume}}$

Question 12

If a spacecraft is designed using English units instead of metric units, which of the following is a possible consequence?

Accepted Answer

Critical errors in calculations leading to mission failure

Question 13

Which SI base unit is used to measure the amount of substance?

Accepted Answer

Mole (mol)

Question 14

A student records the following measurements for the mass of a book: 2.48 kg, 2.50 kg, and 2.49 kg. The actual mass is 2.50 kg. Which statement is true?

Accepted Answer

The measurements are both accurate and precise.

Question 15

Which of the following is the correct SI base unit and symbol for measuring luminous intensity?

Accepted Answer

Candela (cd)

Question 16

A 100-yard football field measures 91.4 meters. How many centimeters is this?

Accepted Answer

$9,140$ cm

Question 17

Which of the following is the correct SI base unit and symbol for measuring electric current?

Accepted Answer

Ampere (A)

Question 18

A sample of water has a volume of 250 mL and a mass of 250 g. What is its density in $g/mL$?

Accepted Answer

$1.0$ $g/mL$

Question 19

Which of the following is the correct definition of precision in scientific measurement?

Accepted Answer

Getting consistent results regardless of proximity to the true value

Question 20

A person weighs 70 kg on Earth. What would be their mass on the Moon?

Accepted Answer

70 kg

Matter, Measurement, and Problem Solving: SI Units and Measurement in Chemistry

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