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 100 °C. What is this temperature in Kelvin (K)? Use the equation $K = ^\circ C + 273.15$.

Accepted Answer

$373.15\ K$

Question 3

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

Accepted Answer

micro ($\mu$)

Question 4

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

Accepted Answer

$5.0 	imes 10^6\ mg$

Question 5

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 6

Which of the following measurements is the most precise?

Accepted Answer

$5.213$

Question 7

How many significant figures are in the measurement $0.04050$?

Accepted Answer

4

Question 8

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

Accepted Answer

$8.59$

Question 9

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 10

Which of the following best describes accuracy in measurement?

Accepted Answer

How close a measurement is to the true value

Question 11

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 12

Which of the following is NOT a base SI unit?

Accepted Answer

Liter (L)

Question 13

Which of the following is the correct formula for density?

Accepted Answer

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

Question 14

A measurement is recorded as $7.12\ g$. The true value is $7.10\ g$. Is this measurement accurate, precise, both, or neither?

Accepted Answer

Accurate

Question 15

Which of the following is the correct conversion for $0.19\ kg$ to $mg$?

Accepted Answer

$1.9 	imes 10^5\ mg$

Question 16

Which of the following best describes precision in measurement?

Accepted Answer

How close repeated measurements are to each other

Essentials: Units, Measurement, and Problem Solving

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