$$1 \text{ cm}^3/1.32 \text{ g}$$

$$1 \text{ m}^2 = 10,000 \text{ cm}^2$$

Question 1

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

Accepted Answer

$$4.5 	imes 10$$^{-2}$$

Question 2

How many significant figures are in the measurement 0.004560?

Accepted Answer

4

Question 3

Which of the following statements about significant figures is TRUE?

Accepted Answer

Trailing zeros after a decimal point are significant.

Question 4

A student multiplies $$2.34 (3 $$sig figs) by $$0.10 (2 $$sig figs). What is the correct number of significant figures in the final answer?

Accepted Answer

2

Question 5

Which calculation below is correctly rounded according to the rules for addition and subtraction?

Accepted Answer

$$5.74 + 0.823 = 6.563 ($$rounded to $$6.56)$$

Question 6

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

Accepted Answer

kilogram

Question 7

A chemical bond is about $$120 pm $$long. Which prefix multiplier is most appropriate for expressing this length?

Accepted Answer

picometer

Question 8

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 9

Convert $$5.00$$ inches to centimeters. (Given: $$1$$ inch $$= 2.54 cm$$, exact)

Accepted Answer

$$12.7 cm$$

Question 10

A sample of liquid has a mass of $$27.2 g $$and a volume of $$22.5 mL. $$What is its density?

Accepted Answer

$$1.21$$ 	ext{ g/mL}$

Question 11

Which of the following is a derived unit?

Accepted Answer

cubic centimeter

Question 12

If a car travels $$60.0$$ miles per hour, what is its speed in kilometers per hour? ($$1$$ mile $$= 1.609 km)$$

Accepted Answer

$$96.5$$ 	ext{ km/h}$

Question 13

Which of the following is the correct conversion factor to convert from grams to cubic centimeters for a substance with density $$1.32 g/cm$^3$$?

Accepted Answer

$$1 	ext{ cm}^3/1.32 	ext{ g}$$

Question 14

A student needs to convert $$25.0 cm$^3 to mL. $$What is the correct answer?

Accepted Answer

$$25.0$$ 	ext{ mL}$

Question 15

Which of the following best describes dimensional analysis?

Accepted Answer

A technique for converting units using conversion factors.

Question 16

A titanium bicycle frame has a mass of $$1.50 kg $$and a volume of $$0.350 L. $$What is its density in g/mL?

Accepted Answer

$$0.429$$ 	ext{ g/mL}$

Question 17

Which of the following is the correct order of steps for solving a unit conversion problem?

Accepted Answer

Sort, Strategize, Solve, Check

Question 18

If you are converting $$5.0 m$^2 to cm$^2$$, which conversion factor should you use?

Accepted Answer

$$1 	ext{ m}^2 = 10,000 	ext{ cm}^2$$

Question 19

A solution map is used in problem solving to:

Accepted Answer

Diagram the steps required to get from the starting point to the end point.

Question 20

A sample of a liquid has a density of $$0.789 g/mL. $$What volume (in mL) would you need to obtain $$50.0 g of $$the liquid?

Accepted Answer

$$63.4$$ 	ext{ mL}$

Measurement and Problem Solving: Study Notes for Introductory Chemistry

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