Question 1

Which of the following numbers has the greatest number of significant figures?

Accepted Answer

$$4.0000$$

Question 2

How many significant figures are in the measurement $$0.00239 L$$?

Accepted Answer

3

Question 3

A student multiplies $$0.942$$ atm by $$0.01$$ atm. What is the correct answer, reported to the proper number of significant figures?

Accepted Answer

$$0.01$$ atm$$^2$$

Question 4

Which of the following correctly expresses $$450 mL $$divided by $$2.3454 mL$$, using the correct number of significant figures?

Accepted Answer

$$192.1 mL$

Question 5

Convert $$100 mg to g $$and report your answer with the correct number of significant figures.

Accepted Answer

$$0.0100 g$

Question 6

A temperature of $$2330^	ext{F} is $$converted to Celsius using the formula $$^	ext{C} = (^	ext{F} - 32) 	imes \frac{5}{9}. $$What is the result, rounded to the correct number of significant figures?

Accepted Answer

$$1271^	$$ext{C}$

Question 7

Which of the following measurements is reported with the correct number of significant figures for the sum $$0.177 + 0.4555 - 0.4$$?

Accepted Answer

$$0.4$$

Question 8

A graduated cylinder contains liquid at the $$18.0 mL $$mark. If the smallest division is $$1 mL$$, what is the correct way to report the volume?

Accepted Answer

$$18.0 mL$

Question 9

Which of the following is the correct conversion of $$450 cm to km$$, using the correct number of significant figures?

Accepted Answer

$$0.0045 km$

Question 10

A student calculates $$68.78 - 59.11 + 0.59811$$ and reports the answer as $$5.78. Is $$this correct, and why?

Accepted Answer

Yes, because the answer is rounded to two decimal places, matching the least precise measurement.

Question 11

Which of the following correctly expresses the product $$8.62$$ grams $$\div 1.000 mL$?$$

Accepted Answer

$$8.62 g/mL$

Question 12

If you measure an object with a ruler marked every $$1 cm $$and estimate one digit beyond, how should you report a length of $$133 cm$$?

Accepted Answer

$$133.0 cm$

Question 13

Which of the following numbers is ambiguous in terms of significant figures unless written in scientific notation?

Accepted Answer

$$890$$

Question 14

A student divides $$900 by$$ $$0.020$$ and reports the answer as $$10.0. Is $$this correct, and why?

Accepted Answer

Yes, because the answer has the correct number of significant figures.

Question 15

Which of the following is the correct way to report the sum $$1.70 	imes 10^6$ g/cm^3$ with the correct number of significant figures?

Accepted Answer

$$1.7 	imes 10^6$ g/cm^3$

Question 16

A student measures the length of an object using a ruler with the smallest marked place value of $$0.1 cm. $$The object is $$13.45 cm $$long. How many significant figures should be reported?

Accepted Answer

4

Question 17

Which of the following is the correct answer for $$6.00 cm$^2$$ reported to the correct number of significant figures?

Accepted Answer

$$3.6 	imes 10^2$ cm^2$

Question 18

A student adds $$100 g/cm$^3$$ and $$4.56 g/cm$^3. $$What is the correct answer, reported to the proper number of significant figures?

Accepted Answer

$$105 g/cm$^3$$

Question 19

Which of the following is the correct answer for $$1.00 	imes 10^3$ reported to the correct number of significant figures?

Accepted Answer

$$1.00 	imes 10^3$

Numbers, Units, and Significant Figures in General Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard