Question 1

Which of the following is the correct SI unit and symbol for measuring mass?

Accepted Answer

Kilogram (kg)

Question 2

A temperature is measured as 25.0 $$^oC. $$What is this temperature in Kelvin ($$K$$)? Use the equation $$K = ^oC + 273.15.$$

Accepted Answer

$$298.15\ K$$

Question 3

Convert $$100^oC to$$ $$^oF $$using the equation $$^oF = \frac{9}{5}(^oC) + 32.$$

Accepted Answer

$$212^oF$$

Question 4

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

Accepted Answer

micro ($$\mu)$$

Question 5

A cube has a length of $$2.0\ cm on $$each side. What is its volume in $$cm^3$$?

Accepted Answer

$$8.0\ cm^3$

Question 6

A graduated cylinder contains $$50.0\ mL of $$water. After adding a solid, the water level rises to $$53.3\ mL. If $$the solid has a mass of $$10.0\ g$$, what is its density?

Accepted Answer

$$3.03\ g/mL$$

Question 7

Which of the following measurements is both precise and accurate if the true value is $$7.42\ g$$?

Accepted Answer

$$7.42\ g, 7.42\ g, 7.42\ g$$

Question 8

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

Accepted Answer

3

Question 9

Calculate $$3.905 	imes 2.20$$ and round to the correct number of significant figures.

Accepted Answer

$$8.6$$

Question 10

A sample of acetone has a density of $$0.7857\ g/mL. $$What is the mass, in grams, of $$25.36\ mL of $$acetone?

Accepted Answer

$$19.93\ g$$

Question 11

Which of the following best describes the difference between accuracy and precision?

Accepted Answer

Accuracy is how close measurements are to the true value; precision is how close measurements are to each other.

Question 12

Which of the following is the correct formula for density?

Accepted Answer

$$Density = \frac{Mass}{Volume}$$

Question 13

The density of carbon tetrachloride ($$CCl_4) is$$ $$1.59\ g/mL. $$What is the volume, in $$mL$$, of $$100.0\ g of$$ $$CCl_4$$?

Accepted Answer

$$62.9\ mL$$

Question 14

Which of the following is NOT a base SI unit?

Accepted Answer

Liter (L)

Question 15

Convert $$5.0\ kg to$$ $$mg$$ using the appropriate prefix multipliers.

Accepted Answer

$$5.0 	imes 10^6$\ mg$$

Question 16

Which of the following measurements has the greatest number of significant figures?

Accepted Answer

0.004560

Question 17

A student records the following masses: $$2.56\ g, 2.57\ g, 2.58\ g. If $$the true value is $$2.60\ g$$, how would you describe these measurements?

Accepted Answer

Precise but not accurate

Question 18

Which of the following is the correct conversion for $$1\ cm^3$?

Accepted Answer

$$1\ cm^3$ = 1\ mL$$

Question 19

If a measurement is $$0.0200\ g$$, how many significant figures does it have?

Accepted Answer

3

Essentials: Units, Measurement, and Problem Solving

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