Q: Which of the following is an equality?

$$1 \text{ m} = 100 \text{ cm}$$

Question 1

Which of the following statements best represents a hypothesis according to the scientific method?

Accepted Answer

If fertilizer is added, then the plant will grow faster.

Question 2

Convert the expanded notation $$0.00056$$ into scientific notation.

Accepted Answer

$$5.6 	imes 10$$^{-4}$$

Question 3

Express $$3.2 	imes 10$$^{5}$$ in expanded notation.

Accepted Answer

$$320,000$$

Question 4

Which number is larger: $$4.5 	imes 10$$^{3}$$ or 4500$?

Accepted Answer

They are equal.

Question 5

What is the base unit for mass in the metric system?

Accepted Answer

Gram

Question 6

Which of the following is a correct measurement?

Accepted Answer

25 kg

Question 7

Classify the following as measured or exact: There are 12 eggs in a dozen.

Accepted Answer

Exact

Question 8

How many significant figures are in the number $$0.04050$$?

Accepted Answer

4

Question 9

Round $$0.004567 to $$three significant figures.

Accepted Answer

$$0.00456$$

Question 10

Calculate $$2.34 	imes 1.2$$ and round your answer to the correct number of significant figures.

Accepted Answer

$$2.8$$

Question 11

Which prefix represents one thousandth ($$1/1000) of a $$base unit?

Accepted Answer

milli-

Question 12

Which of the following is an equality?

Accepted Answer

$$1 	ext{ m} = 100 	ext{ cm}$$

Question 13

A nurse needs to administer $$0.25 L of $$saline. How many milliliters is this?

Accepted Answer

$$2500$$ 	ext{ mL}

Question 14

Which of the following numbers is considered exact?

Accepted Answer

$$1000$$ 	ext{ g in a kg}

Question 15

Which of the following is the correct way to write $$0.000123 in $$scientific notation?

Accepted Answer

$$1.23 	imes 10$$^{-4}$$

Question 16

A student records a measurement as $$5.00 m. $$How many significant figures does this measurement have?

Accepted Answer

3

Question 17

Which of the following is the correct base unit for length in the metric system?

Accepted Answer

Meter

Question 18

If you multiply $$3.00 	imes 10$$^{2}$$ by 2.0$$ 	imes $$10^{1}$$, what is the answer in scientific notation with the correct number of significant figures?

Accepted Answer

$$6.0 	imes 10$$^{3}$$

Question 19

Which prefix increases a base unit by a factor of $$1000$$?

Accepted Answer

kilo-

Question 20

A patient’s temperature is measured as $$37.0$$ °C. Is this value measured or exact?

Accepted Answer

Measured

Chapters 1 & 2: Chemistry in Our Lives and Chemistry and Measurements – Study Guide

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