Question 1

Which of the following best describes the concept of significant figures in a measurement?

Accepted Answer

All the certain digits plus one estimated digit in a measurement.

Question 2

A student records the mass of a sample as 0.00360 g. How many significant figures does this measurement have?

Accepted Answer

4

Question 3

Which of the following numbers has 3 significant figures?

Accepted Answer

$$0.00450$$

Question 4

When multiplying $$2.50 	imes 10^3$ by 4.0$$ 	imes $$10^2$$, how many significant figures should the answer have?

Accepted Answer

2

Question 5

A measurement is recorded as $$61.295 + 8.2. $$What is the correct answer with the proper number of decimal places?

Accepted Answer

$$69.5$$

Question 6

Which of the following best describes accuracy in scientific measurement?

Accepted Answer

How close a measurement is to the true value.

Question 7

A student measures the mass of an object four times and gets: 5.12 g, 5.13 g, 5.11 g, and 5.12 g. The accepted value is 5.50 g. Which statement is true?

Accepted Answer

The measurements are precise but not accurate.

Question 8

What is the percent error if a student measures the boiling point of water as $$102.0^\circ C$$ and the accepted value is $$100.0^\circ C$$?

Accepted Answer

$$2.0\%$$

Question 9

A Canadian vacationing in the United States pays $$3.29$$ per gallon for gasoline. What is the approximate price per liter in Canadian dollars if $$1$$ gallon $$= 3.78 L $$and $$1$$ USD $$= 1.25$$ CAD?

Accepted Answer

$$1.09$$

Question 10

Which of the following is the correct metric prefix for $$10^{-6}$$?

Accepted Answer

micro-

Question 11

Convert $$0.065 km to $$meters using dimensional analysis.

Accepted Answer

$$65 m$$

Question 12

A gold bar has a density of $$19.3 	ext{ g/cm}^3. $$What is the mass of a gold bar with a volume of $$4.50 	ext{ cm}^3$$?

Accepted Answer

$$86.9 g$$

Question 13

Which of the following is the correct relationship between Celsius and Kelvin?

Accepted Answer

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

Question 14

If the temperature changes from $$45^\circ C to$$ $$46^\circ C$$, what is the change in Kelvin?

Accepted Answer

$$1 K$$

Question 15

Which of the following is NOT a base SI unit?

Accepted Answer

gram

Question 16

A student needs to convert $$750,000 cm to km. $$What is the correct answer?

Accepted Answer

$$7.5 km$$

Question 17

Which of the following best describes precision in scientific measurement?

Accepted Answer

How close repeated measurements are to each other.

Question 18

A student measures the mass of water delivered by a pipet four times: $$9.993 g$$, $$9.995 g$$, $$9.993 g$$, $$9.980 g. $$What is the mean absolute deviation (MAD)?

Accepted Answer

$$0.008 g$$

Question 19

Which of the following is the correct density formula?

Accepted Answer

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

Question 20

Which of the following is the correct value for 1 mL of water in grams?

Accepted Answer

$$1 g$$

Measurement, Significant Figures, Metric Conversions, and Density in Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard