$$4.88 \times 10$$^{6}$$ inches

$$q = m \times c \times \Delta T$$

Multiply by $$10^3$$; $$3 \times 10^3$ = 3000$$ grams

Question 1

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

Accepted Answer

Copper reacts with oxygen to form copper oxide.

Question 2

A student measures the mass of a sample as 0.1400 kg. How many significant digits are in this measurement?

Accepted Answer

4

Question 3

Which of the following best describes a mixture?

Accepted Answer

A combination of two or more substances in which each retains its own identity.

Question 4

Express the number 0.000 000 000 000 000 000 000 327 g in scientific notation.

Accepted Answer

$$3.27 	imes 10$$^{-25}$$ g

Question 5

When adding 4.87 mL and 46.0 mL, what is the correct answer rounded to the proper number of significant digits?

Accepted Answer

$$50.9 mL$$

Question 6

Which of the following is an exact number?

Accepted Answer

There are 12 eggs in a dozen.

Question 7

A graduated cylinder contains 25.0 mL of water. If 0.01 mL is added, what is the total volume reported to the correct number of decimal places?

Accepted Answer

$$25.0 mL$$

Question 8

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

Accepted Answer

micro

Question 9

A sample of silver has a mass of 100.0 g and a density of 10.40 g/cm$$^3. $$What is its volume in cm$$^3$$?

Accepted Answer

$$9.62 cm$^3$$

Question 10

Which of the following changes is a physical change?

Accepted Answer

Evaporation of water from a lake.

Question 11

Convert 77 miles to scientific notation in inches. (1 mile = 5280 ft, 1 ft = 12 in)

Accepted Answer

$$4.88 	imes 10$$^{6}$$ inches

Question 12

A student multiplies 3.4 by 0.023 g. What is the answer rounded to the correct number of significant digits?

Accepted Answer

$$0.078 g$$

Question 13

Which of the following statements about density is correct?

Accepted Answer

Density is dependent on temperature.

Question 14

What is the specific heat equation used to calculate the heat required to raise the temperature of a substance?

Accepted Answer

$$q = m 	imes c 	imes \Delta T$$

Question 15

A 20.0 g sample of gold is heated from 25°C to 55°C. If the specific heat of gold is 0.031 cal/g°C, how many calories of heat are required?

Accepted Answer

$$18.6$$ cal

Question 16

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

Accepted Answer

$$K = ^\circ C + 273$$

Question 17

If a measurement is reported as 0.0005 seconds, how many significant digits and decimal places does it have?

Accepted Answer

1 significant digit, 4 decimal places

Question 18

Which of the following is NOT a step in dimensional analysis for unit conversion?

Accepted Answer

Add the conversion factor to the given unit.

Question 19

A student wants to convert 3 kilograms to grams. What is the correct conversion factor and answer?

Accepted Answer

Multiply by $$10^3$$; $$3 	imes 10^3$ = 3000$$ grams

Question 20

Which of the following statements about significant digits is correct?

Accepted Answer

Significant digits include all certain digits and one uncertain digit.

Chapter 1: Matter and Measurements – Study Notes

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