Question 1

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

Accepted Answer

$$1.245 	imes 10^7$

Question 2

How many significant figures are in the number $$0.00013$$?

Accepted Answer

2

Question 3

Calculate $$(6.28 	imes 10^3$) 	imes (0.1065)$$ and express the answer with the correct number of significant figures.

Accepted Answer

$$6.69 	imes 10^2$

Question 4

A student adds $$12.0450$$ and $$9.47. $$What is the sum, reported to the correct number of significant figures?

Accepted Answer

$$21.52$$

Question 5

Which of the following measurements represents the heaviest mass?

Accepted Answer

1 Mg

Question 6

What is the correct SI unit for temperature?

Accepted Answer

Kelvin

Question 7

Convert $$8.2 	imes 10$$^{-2}$$ L to mL.

Accepted Answer

$$82$$\ mL

Question 8

A sample of an unknown metal has a mass of $$35.4 g $$and a volume of $$3.11 cm$^3. $$What is its density in g/cm$$^3$$?

Accepted Answer

$$11.4$$\ $$g/cm^3$

Question 9

Glycerol has a mass of $$3.15 	imes 10^3$ g and a volume of 2.50$ L. What is its density in g/cm^3$?

Accepted Answer

$$1.26$$\ $$g/cm^3$

Question 10

Acetone has a density of $$0.7857 g/cm$^3. $$What is the mass in grams of $$17.53 mL of $$acetone?

Accepted Answer

$$13.77$$\ g$

Question 11

How many microliters are in $$41.0 mL$$?

Accepted Answer

$$4.10 	imes 10^4$

Question 12

A room measures $$10.0 ft$$ $$	imes$$ $$11.0 ft$$ $$	imes$$ $$8.00 ft. $$What is the volume in liters? (Given: $$1 ft$$ $$= 12 in$$., $$1 in$$. $$= 2.54 cm$$, $$1 mL$$ $$= 1 cm$^3$$, $$1 mL$$ $$= 1 	imes 10$$^{-3}$$ L)

Accepted Answer

$$2.49 	imes 10^4$\ L

Question 13

Which of the following is the correct prefix for the multiplier $$1000$$?

Accepted Answer

none of the above

Question 14

Convert $$2.5 	imes 10$$^{-8}$$ m to nanometers (nm).

Accepted Answer

$$25$$\ nm

Question 15

A $$2.50 L $$sample of pure glycerol has a mass of $$3.15 	imes 10^3$ g. What is the density in g/mL?

Accepted Answer

$$1.26$$\ g/mL

Question 16

A student calculates $$(2.05631 	imes 6.9391136) / 12.59326. $$What is the correct answer, reported to the proper number of significant figures?

Accepted Answer

$$1.13306$$

Question 17

Which of the following is the standard SI unit for length?

Accepted Answer

meter

Question 18

Convert $$6.73 	imes 10^5$ ns to seconds.

Accepted Answer

$$6.73 	imes 10$$^{-4}$$\ s

Question 19

A medical laboratory needs to prepare $$9.21 mL of $$acetone. If the density of acetone is $$0.7857 g/cm$^3$$, what mass of acetone is required?

Accepted Answer

$$7.24$$\ g

Question 20

A student is asked to convert $$0.420 in/ms to km/hr. $$What is the correct answer?

Accepted Answer

$$38.4$$\ km/hr

Introduction to Chemistry: Chapter 2 & 3 Study Guide Step-by-Step Guidance

Guida di studio - Domande di pratica

Study guide - Flashcard