Q: Which of the following is the correct conversion factor to convert inches to centimeters?

$$1 \text{ in} = 2.54 \text{ cm}$$

Question 1

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

Accepted Answer

$$4.5 	imes 10^2$

Question 2

A measurement is recorded as 2.350 g. How many significant figures does this value have?

Accepted Answer

4

Question 3

Which of the following is an exact number?

Accepted Answer

The number of students in a classroom

Question 4

Convert 0.00056 to scientific notation.

Accepted Answer

$$5.6 	imes 10$$^{-4}$$

Question 5

Which of the following statements about significant figures is correct?

Accepted Answer

Trailing zeros after a decimal point are significant.

Question 6

A student multiplies $$2.3 (2 $$sig figs) by $$3.456 (4 $$sig figs). What is the correct number of significant figures in the final answer?

Accepted Answer

2

Question 7

Which SI prefix corresponds to $$10^{-6}$$?

Accepted Answer

micro-

Question 8

A sample has a mass of $$15.0 g $$and a volume of $$3.0 mL. $$What is its density?

Accepted Answer

$$5.0 g/mL$$

Question 9

Which of the following is the correct conversion factor to convert inches to centimeters?

Accepted Answer

$$1 	ext{ in} = 2.54 	ext{ cm}$$

Question 10

A car travels $$100.0 km. $$Express this distance in meters using scientific notation.

Accepted Answer

$$1.0 	imes 10^5$ m

Question 11

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

Accepted Answer

Mass is a measure of matter, weight is a measure of gravitational pull.

Question 12

A measurement is recorded as $$0.00450 m. $$How many significant figures does this value have?

Accepted Answer

3

Question 13

Which of the following calculations is rounded correctly according to the rules for addition and subtraction?

Accepted Answer

$$2.56 + 1.4 = 4.0$$

Question 14

A chemist needs to convert $$250 mL to $$liters. Which of the following is the correct answer?

Accepted Answer

$$2.5 	imes 10$$^{-1}$$ L

Question 15

A cube has sides of length $$2.0 cm. $$What is its volume in cubic centimeters?

Accepted Answer

$$8.0 cm$^3$$

Question 16

Which of the following is the correct way to use density as a conversion factor?

Accepted Answer

To convert from mass to volume, divide the mass by the density.

Question 17

A solution map is useful in problem-solving because it:

Accepted Answer

Outlines the steps and units needed to solve a problem.

Question 18

A measurement is recorded as $$100,000$$ with no decimal point. How many significant figures does this value have?

Accepted Answer

Ambiguous

Question 19

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

Accepted Answer

Kelvin

Question 20

A Mars orbiter was supposed to establish orbit at $$155 km$$, but was programmed for $$1.55 	imes 10^5$ ft. What is the difference in kilometers between the two altitudes? (1$$ 	ext{ ft} = 0.3048 	ext{ m}$$)

Accepted Answer

$$107 km$$

Measurement and Problem Solving: Scientific Notation, Significant Figures, and SI Units

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