Q: How many micrometers $$(\mu\mathrm{m})$$ are in $$6.0$$ kilometers?

$$6.0 \times 10^9$ \ \mu\mathrm{m}$$

Q: The diameter of an atom is $$1 \times 10$$^{-8}$$ \ \mathrm{cm}. $$What is this in nanometers $$(\mathrm{nm})$$?

$$1 \times 10$$^{-1}$$ \ \mathrm{nm}$$

Question 1

A sample of iron has a mass of 55.85 g. If the density of iron is $$7.86 \ \mathrm{g/cm^3$}$$, what is the volume occupied by the sample?

Accepted Answer

$$7.11 \ \mathrm{cm^3$}$$

Question 2

How many significant figures are in the result of $$(13.7 + 0.82) \div 8.221$$?

Accepted Answer

3

Question 3

A piece of metal with a mass of $$114 \ \mathrm{g}$$ raises water in a cylinder from $$25.00 \ \mathrm{mL} to$$ $$42.50 \ \mathrm{mL}. $$What is the density of the metal?

Accepted Answer

$$6.5 \ \mathrm{g/cm^3$}$$

Question 4

Convert $$500. \ \mathrm{mL} to $$quarts. $$(1 \ \mathrm{L} = 1.06 \ \mathrm{qt})$$

Accepted Answer

$$0.528 \ \mathrm{qt}$$

Question 5

How many inches are in $$2.4$$ miles? $$(1 \ \mathrm{mile} = 5280 \ \mathrm{ft}, 1 \ \mathrm{ft} = 12 \ \mathrm{in})$$

Accepted Answer

$$1.5 	imes 10^5$ inches

Question 6

How many micrometers $$(\mu\mathrm{m})$$ are in $$6.0$$ kilometers?

Accepted Answer

$$6.0 	imes 10^9$ \ \mu\mathrm{m}$$

Question 7

The density of lead is $$11.4 \ \mathrm{g/cm^3$}. $$What volume is occupied by $$25.0 \ \mathrm{g} of $$lead?

Accepted Answer

$$2.19 \ \mathrm{cm^3$}$$

Question 8

Convert $$8.43$$ meters to kilometers.

Accepted Answer

$$0.00843 \ \mathrm{km}$$

Question 9

How many significant figures are in $$0.009090$$?

Accepted Answer

4

Question 10

Express $$185,000,000 in $$scientific notation.

Accepted Answer

$$1.85 	imes 10^8$

Question 11

The number $$1.050 	imes 10^4$ has how many significant figures?

Accepted Answer

4

Question 12

The diameter of an atom is $$1 	imes 10$$^{-8}$$ \ \mathrm{cm}. $$What is this in nanometers $$(\mathrm{nm})$$?

Accepted Answer

$$1 	imes 10$$^{-1}$$ \ \mathrm{nm}$$

Question 13

Which element is most likely to be malleable, ductile, and lustrous?

Accepted Answer

Magnesium

Question 14

Which of the following represents a chemical change?

Accepted Answer

Milk turns sour

Question 15

Which of the following is a physical change?

Accepted Answer

Condensation of water vapor

Question 16

Which of the following is a physical property?

Accepted Answer

Boiling point

Question 17

Which of the following is a chemical property?

Accepted Answer

Taste

Question 18

Which of the following is a physical change?

Accepted Answer

Water turns to steam

Question 19

A patient receives a $$500 \ \mathrm{mL} IV $$bag of saline. If the nurse needs to convert this to liters for a medication calculation, what is the correct value?

Accepted Answer

$$0.500 \ \mathrm{L}$$

Fundamental Concepts and Calculations in GOB Chemistry

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