Q: A cube of silver measures 0.56 m on each side. If the density of silver is $$10.5\ \text{g/cm}^3$$, what is the mass in kilograms?

$$1.85 \times 10^2$\ \text{kg}$$

Q: A patient has approximately 83 mL of blood pumping by their heart at each beat. If their pulse is 75 beats per minute, how much blood is pumped in one day?

$$8.964 \times 10^6$\ \text{mL}$$

Q: Which of the following is the correct formula for density?

$$\text{Density} = \frac{\text{mass}}{\text{volume}}$$

Q: A water sample contains chlorobenzene at a concentration of $$16\ \text{ppm} (by $$volume). What volume of water contains $$5.01 \times 10^2$\ \text{mL} of $$chlorobenzene?

$$3.1 \times 10^7$\ \text{mL}$$

Question 1

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

Accepted Answer

kilogram (kg)

Question 2

A measurement is recorded as 0.003840. How many significant figures does this value have?

Accepted Answer

4

Question 3

Convert 12 minutes into SI units. What is the correct answer?

Accepted Answer

$$720\ 	ext{s}$$

Question 4

Which of the following values is given with SI units?

Accepted Answer

101.3 s

Question 5

When multiplying or dividing numbers, the final answer should have:

Accepted Answer

The least number of significant figures among the numbers used

Question 6

A cube of silver measures 0.56 m on each side. If the density of silver is $$10.5\ 	ext{g/cm}^3$$, what is the mass in kilograms?

Accepted Answer

$$1.85 	imes 10^2$\ 	ext{kg}$$

Question 7

Which metric prefix represents $$10^{-6}$$?

Accepted Answer

micro

Question 8

A patient has approximately 83 mL of blood pumping by their heart at each beat. If their pulse is 75 beats per minute, how much blood is pumped in one day?

Accepted Answer

$$8.964 	imes 10^6$\ 	ext{mL}$$

Question 9

What is the concentration in parts per million (ppm) of DDT if 2.0 mg is found in 1.0 kg of needlefish tissue?

Accepted Answer

$$2.0\ 	ext{ppm}$$

Question 10

A 2.4 L sample of an aqueous solution contains 0.012 mL of NH$$_3. $$What is the concentration of NH$$_3 in $$the solution, expressed as parts per billion (ppb)?

Accepted Answer

$$5000\ 	ext{ppb}$$

Question 11

If the density of blood is $$1.060\ 	ext{kg/cm}^3$$, how many grams of Pb would be found in $$400.00\ 	ext{mL} of $$blood at $$0.620\ 	ext{ppm}$$?

Accepted Answer

$$0.000248\ 	ext{g}$$

Question 12

A copper wire (density = $$8.96\ 	ext{g/cm}^3) $$has a diameter of $$0.32\ 	ext{mm}. If a $$sample of this wire has a mass of $$21.7\ 	ext{g}$$, how long is the wire?

Accepted Answer

$$108\ 	ext{cm}$$

Question 13

What is the specific gravity of lithium metal at $$10.0^{\circ}C$ if a cube measures 0.82$$\ 	ext{cm} 	imes 1.45\ 	ext{cm} 	imes 1.25\ 	ext{cm}$$ and has a mass of 0.794$$\ 	ext{g}$$? (Density of water at 10.0$$^{\circ}$$C is$$ $$0.99975\ 	ext{g/mL})$$

Accepted Answer

$$0.54$$

Question 14

Which of the following is an exact number?

Accepted Answer

125 students

Question 15

A piece of unknown solid weighs $$0.045\ 	ext{lbs}. $$When placed in a beaker, the water level increases from $$200\ 	ext{mL} to$$ $$260\ 	ext{mL}. $$What is the density of the unknown solid in $$	ext{g/mL}$$?

Accepted Answer

$$0.38\ 	ext{g/mL}$$

Question 16

Which of the following is the correct formula for density?

Accepted Answer

$$	ext{Density} = \frac{	ext{mass}}{	ext{volume}}$$

Question 17

Which of the following is NOT a base SI unit?

Accepted Answer

liter (L)

Question 18

A water sample contains chlorobenzene at a concentration of $$16\ 	ext{ppm} (by $$volume). What volume of water contains $$5.01 	imes 10^2$\ 	ext{mL} of $$chlorobenzene?

Accepted Answer

$$3.1 	imes 10^7$\ 	ext{mL}$$

Chemistry and Measurements: Essential Concepts and Applications

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