Question 1

Which of the following is the correct empirical formula for a compound that is 74.94% C, 12.58% H, and 12.48% O by mass?

Accepted Answer

$$C_8H_{16}O_2$

Question 2

A sample of gold has a density of $$19.3\ \mathrm{g/cm^3$}. If $$the price of gold is $$2590$$ per troy ounce and $$1$$ troy ounce is $$31.1 g$$, how many milliliters of gold could you buy with $5000?

Accepted Answer

$$10.1\ \mathrm{mL}$$

Question 3

Sound waves travel at about $$1120\ \mathrm{ft/s}. $$What is the speed of sound in miles per hour? ($$1\ \mathrm{mile} = 5280\ \mathrm{ft})$$

Accepted Answer

$$764\ \mathrm{mi/hr}$$

Question 4

Which of the following is the correct balanced equation for the combustion of ethyl alcohol ($$C_2H_5OH) in $$air?

Accepted Answer

$$C_2H_5OH + 3O_2 \rightarrow 2CO_2 + 3H_2O$$

Question 5

A $$2.50 g $$sample of ethyl alcohol ($$C_2H_5OH) is $$burned in air. What is the mass of $$CO_2$$ produced? (Molar mass of $$C_2H_5OH = 46.07\ \mathrm{g/mol}$$, $$CO_2 = 44.01$$\ \mathrm{g/mol}$$)

Accepted Answer

$$3.19\ \mathrm{g}$$

Question 6

A car travels $$187 km $$between two cities and averages $$23.1$$ miles per gallon. If gasoline costs $$0.792$$ per liter, what is the total cost of gasoline for the trip? ($$1\ \mathrm{mile} = 1.609\ \mathrm{km}$$, $$1\ \mathrm{gallon} = 3.78\ \mathrm{L})$$

Accepted Answer

$$6.40$$

Question 7

Which of the following is the correct name for $$PbCl_2$$?

Accepted Answer

Lead(II) chloride

Question 8

What is the correct formula for potassium sulfide?

Accepted Answer

$$K_2S$$

Question 9

A $$1.510 g $$sample of oxygen reacts completely to form barium oxide. Calculate the mass of barium oxide produced. (Molar mass: $$O_2 = 32.00$$\ \mathrm{g/mol}$$, $$BaO = 153.33\ \mathrm{g/mol}$$, 2Ba$$ + $$O_2$$ \rightarrow 2BaO$$)

Accepted Answer

Question 10

A certain liquid is composed of only C, O, and Cl. When $$5.45 g of $$the liquid is analyzed, $$2.467 g$$ $$CO_2$$ and $$4.088 g$$ $$HCl$$ are produced. What is the empirical formula of the liquid?

Accepted Answer

$$CCl_2O$$

Question 11

Which of the following is the correct name for $$Ni_3N_2$$?

Accepted Answer

Nickel(II) nitride

Question 12

Which of the following is the correct formula for aluminum bromide?

Accepted Answer

$$AlBr_3$$

Question 13

If the molar mass of palmitic acid is $$256.43\ \mathrm{g/mol}$$ and its empirical formula is $$C_8H_{16}O_2$, what is its molecular formula?

Accepted Answer

$$C_{16}H$$_{32}$$O_2$$

Question 14

Which of the following is the correct name for $$K_3PO_4$$?

Accepted Answer

Potassium phosphate

Question 15

Which of the following is the correct formula for iron(III) sulfate?

Accepted Answer

$$Fe_2$$($$SO_4)_3$

Question 16

Which of the following is the correct name for $$Ag_2CO_3$$?

Accepted Answer

Silver carbonate

Question 17

Which of the following is the correct formula for copper(I) oxide?

Accepted Answer

$$Cu_2O$$

Question 18

Which of the following is the correct name for $$Co_3S_2$$?

Accepted Answer

Cobalt(II) sulfide

Question 19

Which of the following is the correct formula for dinitrogen tetroxide?

Accepted Answer

$$N_2O_4$$

Question 20

Which of the following is the correct name for $$CS_2$$?

Accepted Answer

Carbon disulfide

General Chemistry: Fundamental Concepts, Nomenclature, and Problem Solving

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