Question 1

Which of the following numbers is correctly expressed in scientific notation?

Accepted Answer

$$4.5 	imes 10$$^{1}$$

Question 2

A laboratory measurement is recorded as 24.6 mm. Which digit is considered uncertain due to measurement limitations?

Accepted Answer

6

Question 3

How many significant figures are in the measurement 0.004560?

Accepted Answer

5

Question 4

Which of the following is an exact number?

Accepted Answer

The number of students in a classroom

Question 5

A student multiplies $$2.34 (3 $$sig figs) by $$0.10 (2 $$sig figs). What is the correct number of significant figures in the final answer?

Accepted Answer

2

Question 6

Which of the following correctly applies the rules for significant figures in addition: $$5.74 + 0.823 + 2.651$$?

Accepted Answer

$$9.21$$

Question 7

A sample has a mass of $$27.2$$ grams and a volume of $$22.5 mL. $$What is its density?

Accepted Answer

$$1.21 g/mL$$

Question 8

Which SI prefix multiplier would be most appropriate for expressing the length of a chemical bond (about $$120 pm$$)?

Accepted Answer

picometer

Question 9

A car travels $$60.0$$ miles per hour. Convert this speed to kilometers per hour. ($$1$$ mile $$= 1.609 km)$$

Accepted Answer

$$96.5 km/h$$

Question 10

Which of the following statements about mass and weight is correct?

Accepted Answer

Mass is a measure of the quantity of matter, while weight depends on gravity.

Question 11

A solution map is used in chemistry to:

Accepted Answer

Outline the steps required to solve a problem

Question 12

If you convert $$5.00 cm$^3 to mL$$, what is the result?

Accepted Answer

$$5.00 mL$$

Question 13

A NASA probe was supposed to orbit Mars at $$155 km$$, but was programmed for $$1.55 	imes 10^5$ ft. What is the difference in kilometers between the intended and actual altitudes? (1$ ft = 0.3048$ m)

Accepted Answer

$$107 km$$

Question 14

Which of the following is NOT a derived unit?

Accepted Answer

meter

Question 15

When converting $$3.0 cm$^2 to mm$^2$$, what is the correct answer? ($$1 cm$$ $$= 10 mm)$$

Accepted Answer

$$300$$ $$mm^2$

Question 16

Which of the following best describes the uncertainty in a measurement?

Accepted Answer

It is indicated by the last reported digit.

Question 17

A balance has markings every $$0.1$$ gram. If you measure a mass as $$1.26$$ grams, to what place is the last digit estimated?

Accepted Answer

Hundredths place

Question 18

Which of the following conversion factors is exact?

Accepted Answer

$$1 in$$ $$= 2.54 cm$$

Question 19

A liquid has a density of $$0.789 g/mL. $$What volume (in mL) is needed to obtain $$50.0 g of $$the liquid?

Accepted Answer

$$63.4 mL$$

Question 20

Which of the following is the correct way to round $$2.375 to $$two significant figures?

Accepted Answer

$$2.4$$

Measurement and Problem Solving: Study Notes for Introductory Chemistry

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드