Q: Which of the following is the correct relationship for density?

$$\text{Density} = \dfrac{\text{Mass}}{\text{Volume}}$$

Question 1

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

Accepted Answer

Burning a candle

Question 2

A sample of a substance has a mass of $$17.4\ \mathrm{g}$$ and a volume of $$27.3\ \mathrm{cm}^3. $$What is its density?

Accepted Answer

$$0.637\ \mathrm{g/cm}^3$$

Question 3

Which of the following statements about mixtures is correct?

Accepted Answer

Mixtures can be separated by physical methods.

Question 4

Convert $$2500\ \mathrm{mL} to $$liters.

Accepted Answer

$$2.5\ \mathrm{L}$$

Question 5

Which of the following is a physical property?

Accepted Answer

Boiling point

Question 6

A temperature is measured as $$39\ ^\circ\mathrm{C}. $$What is this temperature in degrees Fahrenheit?

Accepted Answer

$$102\ ^\circ\mathrm{F}$$

Question 7

Which of the following is a heterogeneous mixture?

Accepted Answer

Concrete

Question 8

Which of the following units is NOT a metric unit for volume?

Accepted Answer

Quart ($$\mathrm{qt})$$

Question 9

A graduated cylinder contains $$10.0\ \mathrm{mL} of $$water. After adding a metal object, the water level rises to $$13.5\ \mathrm{mL}. If $$the mass of the object is $$27.0\ \mathrm{g}$$, what is its density?

Accepted Answer

$$2.00\ \mathrm{g/mL}$$

Question 10

Which of the following elements is a noble gas?

Accepted Answer

Neon ($$\mathrm{Ne})$$

Question 11

Which of the following is the correct scientific notation for $$0.000082$$?

Accepted Answer

$$8.2 	imes 10$$^{-5}$$

Question 12

Which of the following statements about significant figures is TRUE?

Accepted Answer

Zeros at the end of a number after a decimal point are significant.

Question 13

A solution has a specific gravity of $$0.978. $$What does this mean?

Accepted Answer

The solution is less dense than water.

Question 14

Which of the following is a chemical compound?

Accepted Answer

Sodium chloride ($$\mathrm{NaCl})$$

Question 15

Which of the following is the correct relationship for density?

Accepted Answer

$$	ext{Density} = \dfrac{	ext{Mass}}{	ext{Volume}}$$

Question 16

Which of the following is a correct SI unit and its symbol?

Accepted Answer

Mass: kilogram (kg)

Question 17

A patient is prescribed $$20\ \mathrm{mg} of a $$drug. The available tablets contain $$8\ \mathrm{mg}$$ per tablet. How many tablets should the patient take?

Accepted Answer

$$2.5$$ tablets

Question 18

Which of the following is a correct conversion factor?

Accepted Answer

$$1\ \mathrm{kg} = 1000\ \mathrm{g}$$

Question 19

Which of the following is a correct statement about energy?

Accepted Answer

Heat is the energy transferred from a hotter object to a cooler object.

Question 20

Which of the following is a correct example of a homogeneous mixture?

Accepted Answer

Salt water

Fundamental Concepts and Measurements in GOB Chemistry

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