Question 1

Which of the following is an example of a chemical change?

Accepted Answer

Rusting of iron

Question 2

Which property is classified as an intensive property?

Accepted Answer

Melting point

Question 3

A student measures the mass of a tennis ball several times and gets values close to each other but far from the true mass. What does this indicate?

Accepted Answer

Poor accuracy, good precision

Question 4

Which SI base unit is used to measure temperature?

Accepted Answer

Kelvin

Question 5

What is the correct formula for density?

Accepted Answer

$$d = \frac{m}{V}$$

Question 6

Convert 25.0 °C to Kelvin.

Accepted Answer

$$K = 25.0 + 273.15 = 298.15$$

Question 7

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

Accepted Answer

micro

Question 8

A cube has sides of 10 cm. What is its volume in $$cm^3$$?

Accepted Answer

$$V = 10^3$ = 1,000 \ cm^3$

Question 9

Which of the following is a derived SI unit for pressure?

Accepted Answer

Pascal (Pa)

Question 10

If a measurement is reported as 0.00661 g, how many significant figures does it have?

Accepted Answer

3

Question 11

Which rule applies when multiplying or dividing measured values regarding significant figures?

Accepted Answer

The answer cannot have more significant figures than any of the original numbers.

Question 12

A student adds 3.19 and 0.01315. What is the correct answer with proper significant figures?

Accepted Answer

$$3.19 + 0.01315 = 3.20 (2 $$decimal places)

Question 13

Which of the following is NOT a physical property?

Accepted Answer

Rusting

Question 14

What is the SI unit for energy?

Accepted Answer

Joule (J)

Question 15

A sample of mercury has a mass of 27.0 g and a volume of 2.00 mL. What is its density?

Accepted Answer

$$d = \frac{27.0}{2.00} = 13.5 \ g/mL$$

Question 16

Which of the following statements about significant figures is correct?

Accepted Answer

Trailing zeros after a decimal point are always significant.

Question 17

A car burns gasoline and moves forward. Which type of energy conversion is primarily involved?

Accepted Answer

Chemical energy to kinetic energy

Question 18

Which of the following is the correct conversion from Fahrenheit to Celsius?

Accepted Answer

$$^\circ C = \frac{5}{9}(^\circ F - 32)$$

Question 19

Which of the following is a correct order-of-magnitude estimation for $$4.36 	imes 10^5$?

Accepted Answer

$$10^5$$

Question 20

A measurement is reported as 1200 m. How many significant figures does it have?

Accepted Answer

2 (unless specified otherwise)

Units of Measurement for Physical and Chemical Change

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