Q: Mercury has a density of $$13.6 \ \mathrm{g/mL}. $$What is the mass, in grams, of $$95.0 \ \mathrm{mL} of $$mercury?

$$1.29 \times 10^3$ \ \mathrm{g}$$

Question 1

Which of the following is an example of a qualitative measurement in chemistry?

Accepted Answer

The solution turned blue after adding copper sulfate.

Question 2

A student measures the mass of a sample three times and records $$5.12 \ \mathrm{g}$$, $$5.13 \ \mathrm{g}$$, and $$5.11 \ \mathrm{g}. $$The actual mass is $$5.50 \ \mathrm{g}. $$Which statement best describes the measurements?

Accepted Answer

The measurements are precise but not accurate.

Question 3

Which of the following SI base units is correctly matched with its quantity?

Accepted Answer

Mass — kilogram ($$\mathrm{kg})$$

Question 4

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

Accepted Answer

micro ($$\mu)$$

Question 5

A patient’s body temperature is $$39.0 \ ^\circ \mathrm{C}. $$What is this temperature in Kelvin?

Accepted Answer

$$312.0 \ \mathrm{K}$$

Question 6

Which temperature scale does NOT allow for negative values?

Accepted Answer

Kelvin

Question 7

How many significant figures are in the measurement $$0.00430 \ \mathrm{g}$$?

Accepted Answer

3

Question 8

Which of the following numbers has four significant figures?

Accepted Answer

0.0600

Question 9

A graduated cylinder contains a liquid with the meniscus between $$4.5$$ and $$4.6 \ \mathrm{mL}$$, and the smallest division is $$0.1 \ \mathrm{mL}. $$What is the correct way to record the volume?

Accepted Answer

$$4.56 \ \mathrm{mL}$$

Question 10

Which of the following is an intensive property?

Accepted Answer

Density

Question 11

Mercury has a density of $$13.6 \ \mathrm{g/mL}. $$What is the mass, in grams, of $$95.0 \ \mathrm{mL} of $$mercury?

Accepted Answer

$$1.29 	imes 10^3$ \ \mathrm{g}$$

Question 12

Which of the following is the correct relationship for converting inches to centimeters?

Accepted Answer

$$1 \ \mathrm{in} = 2.54 \ \mathrm{cm}$$

Question 13

A sample of water is heated from $$20.0 \ ^\circ \mathrm{C} to$$ $$80.0 \ ^\circ \mathrm{C}. If$$ $$1 \ \mathrm{cal} is $$required to raise the temperature of $$1 \ \mathrm{g} of $$water by $$1 \ ^\circ \mathrm{C}$$, how much energy in joules is required to heat $$50.0 \ \mathrm{g} of $$water?

Accepted Answer

$$12,500 \ \mathrm{J}$$

Question 14

Which of the following best describes an exothermic process?

Accepted Answer

The system loses heat to the surroundings.

Question 15

A student adds $$23.467 \ \mathrm{in}$$ and $$313.21 \ \mathrm{in}. $$What is the correct answer with the proper number of significant figures?

Accepted Answer

$$336.68 \ \mathrm{in}$$

Question 16

Convert $$288 \ \mathrm{cm} to $$yards. ($$1 \ \mathrm{m} = 1.094 \ \mathrm{yd}$$, $$100 \ \mathrm{cm} = 1 \ \mathrm{m})$$

Accepted Answer

$$3.15 \ \mathrm{yd}$$

Question 17

Which of the following is the correct rule for determining significant figures in multiplication and division?

Accepted Answer

The answer should have the same number of significant figures as the measurement with the fewest significant figures.

Question 18

Which of the following is an example of a systematic error?

Accepted Answer

A balance that always reads 0.05 g too high.

Question 19

Which of the following is the correct scientific notation for $$0.0310$$ with the correct number of significant figures?

Accepted Answer

$$3.10 	imes 10$$^{-2}$$

Question 20

A $$10 \ \mathrm{kg}$$ weight is dropped from a building and hits the ground, generating thermal energy. Which statement best describes the energy changes?

Accepted Answer

Potential energy is converted to kinetic energy, then to thermal energy.

Essentials: Units, Measurements, and Problem Solving (General Chemistry Study Notes)

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