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 is an example of a chemical change?

Accepted Answer

Iron rusting when exposed to air

Question 2

Which of the following statements about the periodic table is correct?

Accepted Answer

Elements in the same group have the same number of valence electrons.

Question 3

A student measures the mass of a sample as $$12.45\ \mathrm{g}. $$How many significant figures are in this measurement?

Accepted Answer

$$4$$

Question 4

Which of the following is the correct scientific notation for $$0.00056$$?

Accepted Answer

$$5.6 	imes 10$$^{-4}$$

Question 5

Which of the following is a physical property?

Accepted Answer

Density

Question 6

A graduated cylinder contains $$25.0\ \mathrm{mL} of $$water. A student adds a metal object, and the water level rises to $$32.5\ \mathrm{mL}. $$What is the volume of the metal object?

Accepted Answer

$$7.5\ \mathrm{mL}$$

Question 7

Which of the following is the correct conversion for $$1.00\ \mathrm{kg} to $$grams?

Accepted Answer

$$1000\ \mathrm{g}$$

Question 8

Which of the following best describes the law of conservation of mass?

Accepted Answer

Mass is neither created nor destroyed in a chemical reaction.

Question 9

A sample of a compound contains $$12.0\ \mathrm{g} of $$carbon and $$32.0\ \mathrm{g} of $$oxygen. What is the mass percent of oxygen in the compound?

Accepted Answer

$$72.7\%$$

Question 10

Which of the following is a heterogeneous mixture?

Accepted Answer

Sand and iron filings

Question 11

Which of the following elements is a noble gas?

Accepted Answer

Neon

Question 12

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

Accepted Answer

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

Question 13

A student records a temperature of $$37.0\ ^\circ\mathrm{C}. $$What is this temperature in Kelvin?

Accepted Answer

$$310.2\ \mathrm{K}$$

Question 14

Which of the following is a chemical property?

Accepted Answer

Ability to react with oxygen

Question 15

Which of the following is the correct symbol for the element potassium?

Accepted Answer

K

CHEM 110 Exam Study Guidance – Spring 2020

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