Question 1

Which of the following statements best describes a chemical property?

Accepted Answer

It is a property that describes the ability of a substance to undergo a specific chemical change, such as flammability.

Question 2

A student measures the mass of a sample as 12.30 g and the volume as 4.1 mL. What is the density of the sample, reported with the correct number of significant figures?

Accepted Answer

$$3.00\ \mathrm{g/mL}$$

Question 3

Which of the following is the correct nuclear symbol for an isotope of carbon with 6 protons and 8 neutrons?

Accepted Answer

$$^{14}_{6}\mathrm{C}$$

Question 4

Which element is a member of the alkaline earth metals?

Accepted Answer

Magnesium ($$\mathrm{Mg})$$

Question 5

What is the correct formula for the ionic compound formed between calcium and nitrate?

Accepted Answer

$$\mathrm{Ca(NO_3$)_2}$$

Question 6

Which of the following is the correct name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 7

How many moles are in $$18.0\ \mathrm{g} of $$water ($$\mathrm{H_2O}$$)?

Accepted Answer

$$1.00\ \mathrm{mol}$$

Question 8

Which of the following best describes a redox reaction?

Accepted Answer

A reaction in which electrons are transferred between species.

Question 9

What is the molar mass of $$\mathrm{Na_2SO_4}$$?

Accepted Answer

$$142\ \mathrm{g/mol}$$

Question 10

Which of the following compounds contains a Type II cation?

Accepted Answer

$$\mathrm{$$FeCl_3$$}$$

Question 11

A sample contains $$3.01 	imes 10$$^{23}$$ molecules of $$\mathrm{$$CO_2$$}$$. How many moles of $$\mathrm{$$CO_2$$}$$ are present?

Accepted Answer

$$0.500\ \mathrm{mol}$$

Question 12

Which of the following is the correct balanced equation for the combustion of methane ($$\mathrm{CH_4$}$$)?

Accepted Answer

$$\mathrm{CH_4$} + 2\mathrm{O_2$} \rightarrow \mathrm{CO_2$} + 2\mathrm{H_2O}$$

Question 13

Which of the following acids is correctly named?

Accepted Answer

HNO$$_3 is $$nitric acid.

Question 14

What is the percent composition by mass of oxygen in $$\mathrm{H_2O}$$?

Accepted Answer

$$88.8\%$$

Question 15

Which of the following molecules has a linear molecular shape?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 16

A reaction is carried out with $$5.0\ \mathrm{g} of$$ $$\mathrm{Al}$$ and $$10.0\ \mathrm{g} of$$ $$\mathrm{O_2$}. $$Which reactant is the limiting reagent in the formation of $$\mathrm{Al_2O_3}$$?

Accepted Answer

$$\mathrm{Al}$$

Question 17

Which of the following best describes the octet rule?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve eight electrons in their valence shell.

Question 18

What is the empirical formula for a compound containing $$40.0\%$$ carbon, $$6.7\%$$ hydrogen, and $$53.3\%$$ oxygen by mass?

Accepted Answer

$$\mathrm{CH_2O}$$

Question 19

Which of the following is a decomposition reaction?

Accepted Answer

$$\mathrm{2H_2O} \rightarrow 2\mathrm{H_2$} + \mathrm{O_2$}$$

General Chemistry Exam 1 Review: Measurements, Atoms, Compounds, and Reactions

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