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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