Q: Which of the following is the correct dimensional analysis setup to convert 15 mg to grams?

$$15\ mg \times \frac{1\ g}{1000\ mg}$$

Question 1

Which of the following is NOT an SI base unit?

Accepted Answer

Joule (J)

Question 2

A scientist measures the mass of a sample as 0.00560 kg. How many significant figures are in this measurement?

Accepted Answer

3

Question 3

Which prefix represents a factor of $$10^{-6}$$?

Accepted Answer

micro-

Question 4

A student needs to convert 2500 milliliters (mL) to liters (L). What is the correct conversion?

Accepted Answer

$$2.5\ L$$

Question 5

Which of the following correctly expresses 0.0006 g in scientific notation?

Accepted Answer

$$6 	imes 10$$^{-4}$$\ g$$

Question 6

A plastic ball has a mass of 15.8 g and a volume of 19.7 cm$$^3. If $$the density of gasoline is $$0.70\ g/cm^3$, will the ball sink or float in gasoline?

Accepted Answer

Sink, because its density is greater than gasoline

Question 7

Which of the following is the correct formula to convert Celsius temperature to Kelvin?

Accepted Answer

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

Question 8

A small piece of gold has a volume of $$0.93\ cm^3$. If the density of gold is 19.3$$\ $$g/cm^3$$, what is its mass?

Accepted Answer

$$17.95\ g$$

Question 9

Which of the following statements about significant figures is TRUE?

Accepted Answer

All non-zero digits are significant.

Question 10

A student adds $$12.345\ g$$ and $$0.6\ g. $$What is the correct answer, rounded to the proper number of significant figures?

Accepted Answer

$$12.9\ g$$

Question 11

Which SI derived unit is used to measure pressure?

Accepted Answer

Pascal (Pa)

Question 12

A substance has a density of $$3.26\ g/cm^3$ and a volume of 0.350$$\ $$cm^3. $$What is its mass?

Accepted Answer

$$1.14\ g$$

Question 13

Which of the following is the correct scientific notation for 14 kilometers expressed in meters?

Accepted Answer

$$1.4 	imes 10^4$\ m$$

Question 14

Which temperature scale is considered the absolute zero scale and does not use the degree symbol?

Accepted Answer

Kelvin

Question 15

A student finds a shiny piece of metal with a mass of $$614\ g$$ and a volume of $$78\ cm^3$. What is its density?

Accepted Answer

$$7.87\ g/cm^3$

Question 16

Which of the following is the correct SI prefix for $$10^6$$?

Accepted Answer

Mega-

Question 17

A surgical instrument is sterilized at $$170^\circ C$$ for 1.5 hours. What is this temperature in Kelvin?

Accepted Answer

$$443\ K$$

Question 18

Which of the following is the correct dimensional analysis setup to convert 15 mg to grams?

Accepted Answer

$$15\ mg 	imes \frac{1\ g}{1000\ mg}$$

Question 19

When multiplying and dividing measurements, how many significant figures should the answer have?

Accepted Answer

The same as the measurement with the least number of significant figures

Question 20

A piece of silicon has a mass of $$62.9\ g$$ and a density of $$2.33\ g/cm^3$. What is its volume?

Accepted Answer

$$27.0\ cm^3$

Measurements in Chemistry: SI Units, Temperature, Density, and Significant Figures

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