$$1 \times 10$$^{-9}$$, a billionth

$$5.0 \times 10$$^{-7}$$ meters

$$3.2 \times 10$$^{-12}$$ mol/L

Question 1

Which of the following correctly matches the prefix 'nano-' with its scientific notation and word equivalent?

Accepted Answer

$$1 	imes 10$$^{-9}$$, a billionth

Question 2

A chemist measures a sample with a mass of $$3.5 	imes 10$$^{-6}$$ grams. Which prefix would best represent this value?

Accepted Answer

micro-

Question 3

If a distance is measured as $$0.000 000 001$$ meters, what is the correct way to express this using a metric prefix?

Accepted Answer

1 nanometer

Question 4

Which of the following prefixes represents a factor of $$10^{12}$$?

Accepted Answer

tera-

Question 5

A laboratory instrument can detect concentrations as low as $$1 	imes 10$$^{-15}$$ mol/L. What is the appropriate prefix for this concentration?

Accepted Answer

femto-

Question 6

Convert $$5.2$$ gigameters to meters.

Accepted Answer

$$5.2 	imes 10$$^{9}$$ meters

Question 7

Which of the following is the correct abbreviation and value for the prefix 'centi-'?

Accepted Answer

c, $$1 	imes 10$$^{-2}$$

Question 8

A DNA molecule is approximately $$2$$ nanometers wide. Express this width in meters.

Accepted Answer

$$2 	imes 10$$^{-9}$$ meters

Question 9

Which prefix would you use to express a quantity of $$0.000 001$$ seconds?

Accepted Answer

micro-

Question 10

A sample contains $$4.7 	imes 10$$^{15}$$ atoms. Which prefix best expresses this number?

Accepted Answer

peta-

Question 11

Which of the following correctly orders the prefixes from largest to smallest?

Accepted Answer

giga-, mega-, kilo-, centi-

Question 12

A chemist needs to prepare $$0.25$$ liters of a solution. Express this volume in milliliters.

Accepted Answer

$$250$$ milliliters

Question 13

Which prefix and abbreviation would you use for a measurement of $$1 	imes 10$$^{-18}$$ meters?

Accepted Answer

atto-, a

Question 14

A computer hard drive has a capacity of $$2$$ terabytes. How many bytes is this?

Accepted Answer

$$2 	imes 10$$^{12}$$ bytes

Question 15

Which of the following is NOT a commonly used prefix in chemistry?

Accepted Answer

yotta-

Question 16

A wavelength of visible light is approximately $$500$$ nanometers. What is this value in meters?

Accepted Answer

$$5.0 	imes 10$$^{-7}$$ meters

Question 17

Which prefix would you use to express a mass of $$0.001$$ grams?

Accepted Answer

milli-

Question 18

A medical test detects a concentration of $$3.2$$ picomoles per liter. What is this value in moles per liter?

Accepted Answer

$$3.2 	imes 10$$^{-12}$$ mol/L

Question 19

Which of the following is the correct value for an angstrom ($$	ext{\AA}) in $$meters?

Accepted Answer

$$1 	imes 10$$^{-10}$$ meters

Question 20

A city is $$1.2$$ megameters away from another city. How many kilometers is this?

Accepted Answer

$$1,200$$ kilometers

SI Prefixes and Units in Chemistry: Study Notes

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