Question 1

A reaction between 10.0 g of aluminum ($$\mathrm{Al}) $$and 19.0 g of chlorine gas ($$\mathrm{Cl_2$}) $$produces aluminum chloride ($$\mathrm{$$AlCl_3$$}) $$according to the equation:

$$\mathrm{2Al + 3Cl_2 \rightarrow 2AlCl_3}$$

Which reactant is the limiting reactant?

Accepted Answer

Chlorine gas ($$\mathrm{Cl_2$})$$

Question 2

How many grams of water are produced when 8.0 g of hydrogen gas reacts with excess oxygen gas according to the equation:

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

($$Molar mass of $$\mathrm{H_2$} = 2.02 g/$$mol, $$\mathrm{H_2O} = 18.02 g/$$mol)

Accepted Answer

71.3 g

Question 3

Which of the following is the correct name for $$\mathrm{P_2O_5}$$?

Accepted Answer

Diphosphorus pentoxide

Question 4

Balance the following equation:

$$\mathrm{C_2H_6 + O_2$ \rightarrow CO_2$ + H_2O}$$

Accepted Answer

$$\mathrm{2C_2H_6 + 7O_2 \rightarrow 4CO_2 + 6H_2O}$$

Question 5

What is the correct formula for iron(III) oxide?

Accepted Answer

$$\mathrm{Fe_2O_3}$$

Question 6

A student mixes 5.0 g of sodium hydroxide ($$\mathrm{NaOH}$$, molar mass = 40.00 g/mol) with 10.0 g of hydrochloric acid ($$\mathrm{HCl}$$, molar mass = 36.46 g/mol) in the reaction:

$$\mathrm{NaOH + HCl \rightarrow NaCl + H_2O}$$

Which reactant is in excess after the reaction is complete?

Accepted Answer

Hydrochloric acid ($$\mathrm{HCl})$$

Question 7

Which of the following compounds is named correctly?

Accepted Answer

$$\mathrm{CO}$$: Carbon monoxide

Question 8

How many moles of $$\mathrm{CO_2$}$$ are produced when 44.0 g of propane ($$\mathrm{C_3H_8}$$, molar mass = 44.1 g/mol) is burned in excess oxygen?

$$\mathrm{C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O}$$

Accepted Answer

3.00 mol

Question 9

Which of the following is the correct name for $$\mathrm{$$CuSO_4$$}$$?

Accepted Answer

Copper(II) sulfate

Question 10

A reaction vessel contains 0.50 mol of $$\mathrm{N_2$}$$ and 1.50 mol of $$\mathrm{H_2$}$$ for the reaction:

$$\mathrm{N_2$ + 3H_2 \rightarrow 2NH_3}$$

After the reaction goes to completion, how many moles of $$\mathrm{H_2$}$$ remain?

Accepted Answer

0.50 mol

Question 11

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

Accepted Answer

$$\mathrm{N_2O_4}$$

Question 12

If 12.0 g of magnesium reacts with 32.0 g of oxygen gas, what is the maximum mass of magnesium oxide ($$\mathrm{MgO}) $$that can be formed?

$$\mathrm{2Mg + O_2$ \rightarrow 2MgO}

($$Molar masses: $$\mathrm{Mg} = 24.3 g/$$mol, $$\mathrm{O_2$} = 32.0 g/$$mol, $$\mathrm{MgO} = 40.3 g/$$mol)

Accepted Answer

20.0 g

Question 13

Which of the following is the correct name for $$\mathrm{Na_2CO_3}$$?

Accepted Answer

Sodium carbonate

Question 14

A patient receives an intravenous solution containing 0.90 g of sodium chloride ($$\mathrm{NaCl}$$, molar mass = 58.44 g/mol). How many moles of sodium ions are administered?

Accepted Answer

0.0154 mol

Question 15

Which of the following equations is balanced correctly?

Accepted Answer

$$\mathrm{2K + 2H_2O \rightarrow 2KOH + H_2$}$$

Question 16

What is the correct name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 17

A chemist reacts 0.25 mol of calcium chloride ($$\mathrm{$$CaCl_2$$}) $$with 0.30 mol of sodium carbonate ($$\mathrm{Na_2CO_3}) $$according to:

$$\mathrm{$$CaCl_2$$ + Na_2CO_3 \rightarrow $$CaCO_3$$ + 2NaCl}$$

How many moles of $$\mathrm{$$CaCO_3$$}$$ are formed?

Accepted Answer

0.25 mol

Question 18

Which of the following is the correct formula for calcium phosphate?

Accepted Answer

$$\mathrm{Ca_3$(PO_4$)_2}$$

Question 19

Which of the following is the correct name for $$\mathrm{SF_6$}$$?

Accepted Answer

Sulfur hexafluoride

Question 20

A solution contains 0.10 mol of $$\mathrm{$$AgNO_3$$}$$ and 0.15 mol of $$\mathrm{NaCl}. $$The reaction is:

$$\mathrm{$$AgNO_3$$ + NaCl \rightarrow AgCl + $$NaNO_3$$}$$

After the reaction is complete, how many moles of $$\mathrm{NaCl}$$ remain?

Accepted Answer

0.05 mol

Stoichiometry, Chemical Equations, and Nomenclature: Study Guide

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