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

What is the result of $$5.892 \div 6.10$$ rounded to the correct number of significant figures?

Accepted Answer

$$0.966$$

Question 5

Which of the following statements about mass and weight is correct?

Accepted Answer

Mass is independent of gravity, while weight depends on gravity.

Question 6

Convert $$0.00056 to $$scientific notation.

Accepted Answer

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

Question 7

A student measures the mass of a liquid as $$27.2 g $$and its volume as $$22.5 mL. $$What is the density of the liquid?

Accepted Answer

$$1.21 g/mL$$

Question 8

Which SI prefix multiplier would be most appropriate for expressing the length of a chemical bond ($$1.2 	imes 10$$^{-10}$$ m)?

Accepted Answer

pico-

Question 9

How many significant figures are in the number $$0.00450$$?

Accepted Answer

3

Question 10

A car travels $$95.0 km in$$ $$1.20$$ hours. What is the average speed in meters per second ($$\mathrm{m/s}$$)?

Accepted Answer

$$22.0 m/s$$

Question 11

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

Accepted Answer

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

Question 12

A solution map is used in dimensional analysis to:

Accepted Answer

Outline the steps required to convert from one unit to another

Question 13

Which of the following numbers is ambiguous in terms of significant figures?

Accepted Answer

$$100,000$$

Question 14

If you add $$5.74$$, $$0.823$$, and $$2.651$$, what is the answer rounded to the correct number of decimal places?

Accepted Answer

$$9.21$$

Question 15

A sample of titanium has a mass of $$45.0 g $$and a volume of $$10.0 cm$^3. $$What is its density?

Accepted Answer

$$4.50 g/cm$^3$$

Question 16

Which of the following is NOT a base SI unit?

Accepted Answer

liter (L)

Question 17

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

$$108$$ 	ext{ km}$

Question 18

Which rule should you use to determine the number of significant figures in the result of $$3.489 	imes (5.67 - 2.3)$$?

Accepted Answer

Addition/subtraction rule for the subtraction, then multiplication/division rule for the final answer

Question 19

Which of the following is the correct way to convert $$25.0 cm$^3 to mL$$?

Accepted Answer

$$25.0 mL$

Question 20

A liquid has a density of $$1.32 g/cm$^3. $$What volume (in mL) should be measured to deliver a mass of $$68.4 g$$?

Accepted Answer

$$51.8 mL$$

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

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