Question 1

Which of the following numbers has exactly three significant figures?

Accepted Answer

$0.00340$

Question 2

A student measures the mass of a sample as $12.30$ g and its volume as $4.5$ mL. What is the density of the sample, reported to the correct number of significant figures?

Accepted Answer

$2.7$ \frac{g}{mL}$

Question 3

Which of the following statements about significant figures is correct?

Accepted Answer

All zeros between nonzero digits are significant.

Question 4

Calculate $(16.2 + 9.203)$ cm and report the answer with the correct number of decimal places.

Accepted Answer

$25.4$ cm

Question 5

Which of the following is an example of a physical change?

Accepted Answer

Ice melting

Question 6

A measurement is recorded as $0.00850$ kg. How many significant figures does this value have?

Accepted Answer

3

Question 7

Which of the following is an intensive property?

Accepted Answer

Density

Question 8

Convert $1.25$ g/cm$^3$ to kg/m$^3$.

Accepted Answer

$1250$ \frac{kg}{m^3}$

Question 9

Which of the following is a chemical property?

Accepted Answer

Flammability

Question 10

A student adds $3.26 	imes 10^3$ mg and $7.88 	imes 10^2$ mg. What is the answer in scientific notation with the correct number of significant figures?

Accepted Answer

$4.04 	imes 10^3$ mg

Question 11

Which of the following is a correct statement about accuracy and precision?

Accepted Answer

Accuracy is how close a measurement is to the true value.

Question 12

Which of the following is an exact number?

Accepted Answer

100 cm in 1 m

Question 13

Which of the following is a heterogeneous mixture?

Accepted Answer

Wet sand

Question 14

What is the correct answer to $(14.84 	imes 0.55) - 8.02$, rounded to the proper number of significant figures?

Accepted Answer

$0.14$

Question 15

Which of the following is the SI base unit for temperature?

Accepted Answer

Kelvin

Question 16

A student multiplies $2.171$ cm by $4.20$ cm. What is the answer with the correct number of significant figures?

Accepted Answer

$9.12$ 	ext{ cm}^2$

Question 17

Which of the following is a derived SI unit?

Accepted Answer

Cubic meter ($m^3$)

Question 18

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements in fixed, definite proportions.

Question 19

Which of the following is the correct scientific notation for $0.00045$ with two significant figures?

Accepted Answer

$4.5 	imes 10^{-4}$

Question 20

Which of the following is a physical property?

Accepted Answer

Boiling point

Matter, Measurement, and Significant Figures: Foundations of General Chemistry

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