Question 1

Which of the following is a quantitative observation?

Accepted Answer

The temperature increased by $$5.0\ ^\circ\mathrm{C}.$$

Question 2

A measurement consists of which two essential parts?

Accepted Answer

Number and unit

Question 3

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

Accepted Answer

Meter - Length

Question 4

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

Accepted Answer

$$312.15\ \mathrm{K}$$

Question 5

Which metric prefix corresponds to a multiplier of $$10^{-9}$$?

Accepted Answer

nano

Question 6

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

Accepted Answer

3

Question 7

Which of the following numbers has four significant figures?

Accepted Answer

3204

Question 8

When multiplying $$56\ \mathrm{cm} 	imes 4\ \mathrm{cm}$$, how many significant figures should the answer have?

Accepted Answer

1

Question 9

A student adds $$23.46\ \mathrm{g}$$ and $$31.1\ \mathrm{g}. $$What is the correct answer, reported to the proper number of decimal places?

Accepted Answer

$$54.6\ \mathrm{g}$$

Question 10

Which of the following is an example of an exact value?

Accepted Answer

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

Question 11

A sample of mercury has a volume of $$95\ \mathrm{mL}. If $$the density of mercury is $$13.6\ \mathrm{g/cm^3$}$$, what is its mass in grams?

Accepted Answer

$$1292\ \mathrm{g}$$

Question 12

Which property is intensive and does NOT depend on the amount of substance?

Accepted Answer

Density

Question 13

Convert $$2.00\ \mathrm{ft} to $$centimeters using dimensional analysis. ($$1\ \mathrm{ft} = 12\ \mathrm{in}$$, $$1\ \mathrm{in} = 2.54\ \mathrm{cm})$$

Accepted Answer

$$61.0\ \mathrm{cm}$$

Question 14

Which of the following conversion factors is set up correctly to convert from inches to centimeters?

Accepted Answer

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

Question 15

A student measures the mass of a sample as $$0.007590\ \mathrm{g}. $$How many significant figures does this measurement have?

Accepted Answer

5

Question 16

Which of the following statements about significant figures is TRUE?

Accepted Answer

Trailing zeros are only significant if there is a decimal point.

Question 17

A scientist records a measurement as $$45.00\ \mathrm{g}. $$How many significant figures does this value have?

Accepted Answer

4

Question 18

Which of the following is the correct equation to convert Celsius to Fahrenheit?

Accepted Answer

$$^\circ\mathrm{F} = 1.8(^\circ\mathrm{C}) + 32$$

Question 19

Which of the following is a correct statement about dimensional analysis?

Accepted Answer

Conversion factors should be arranged so the starting unit is on the bottom.

Essentials of Units, Measurements, and Problem Solving in General Chemistry

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