Q: Which of the following is the correct formula for calculating density?

$$\text{Density} = \dfrac{\text{mass}}{\text{volume}}$$

Question 1

Which of the following best describes a chemical property?

Accepted Answer

The ability of a substance to react with oxygen

Question 2

A sample of matter is placed in a container and takes the shape of the container but does not expand to fill it. Which state of matter is this sample most likely in?

Accepted Answer

Liquid

Question 3

Which of the following is NOT considered matter?

Accepted Answer

Sunlight

Question 4

Which of the following is a heterogeneous mixture?

Accepted Answer

Oil and vinegar

Question 5

Which of the following is a pure substance?

Accepted Answer

Oxygen gas

Question 6

How many oxygen atoms are present in the chemical formula $$\mathrm{Fe_2$(SO_4$)_3}$$?

Accepted Answer

$$12$$

Question 7

Which of the following is the correct scientific notation for $$0.000073$$?

Accepted Answer

$$7.3 	imes 10$$^{-5}$$

Question 8

A patient weighs $$85\ \mathrm{kg}. $$What is their weight in grams?

Accepted Answer

$$85,000\ \mathrm{g}$$

Question 9

Which of the following measurements contains 3 significant figures?

Accepted Answer

$$0.600\ \mathrm{mL}$$

Question 10

Calculate the area of a rectangle with length $$6.10\ \mathrm{cm}$$ and width $$2.8\ \mathrm{cm}$$, reporting your answer with the correct number of significant figures.

Accepted Answer

$$17.1\ \mathrm{cm}^2$$

Question 11

A dialysis unit requires $$75,000\ \mathrm{mL} of $$distilled water. How many gallons are needed? $$(1\ \mathrm{gal} = 4\ \mathrm{qt};\ 1\ \mathrm{L} = 1.057\ \mathrm{qt})$$

Accepted Answer

$$19.8\ \mathrm{gal}$$

Question 12

Which of the following is the correct conversion factor to convert inches to centimeters?

Accepted Answer

$$1\ \mathrm{in} = 2.54\ \mathrm{cm}$$

Question 13

A cube of lithium metal measures $$0.82\ \mathrm{cm} 	imes 1.45\ \mathrm{cm} 	imes 1.25\ \mathrm{cm}$$ and has a mass of $$0.794\ \mathrm{g}. $$What is its density in $$\mathrm{g/cm^3$}$$?

Accepted Answer

$$0.44\ \mathrm{g/cm^3$}$$

Question 14

Which of the following is an example of a physical change?

Accepted Answer

Melting ice

Question 15

Which of the following statements about elements and compounds is correct?

Accepted Answer

Elements are pure substances that cannot be broken down by chemical means.

Question 16

A doctor orders $$4$$ tablets of amoxicillin per day for $$10$$ days. Each tablet contains $$250\ \mathrm{mg} of $$amoxicillin. How many ounces of medication are given in $$10$$ days? $$(1\ \mathrm{g} = 0.03527\ \mathrm{oz})$$

Accepted Answer

$$0.353\ \mathrm{oz}$$

Question 17

During extreme hypothermia, a patient's temperature drops to $$20.6\ ^\circ\mathrm{C}. $$What is this temperature in Fahrenheit?

Accepted Answer

$$69.1\ ^\circ\mathrm{F}$$

Question 18

Which of the following is the correct formula for calculating density?

Accepted Answer

$$	ext{Density} = \dfrac{	ext{mass}}{	ext{volume}}$$

Question 19

A sample of chloroform has a density of $$1.474\ \mathrm{g/mL}. $$What volume would you use if you needed $$12.37\ \mathrm{g}$$?

Accepted Answer

$$8.392\ \mathrm{mL}$$

Chapter 1: Matter & Measurements – GOB Chemistry Study Notes

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