Spring, 2016 Chemistry Review
1.
What is the molar mass of Mg3N2(s)
2.
What is the molar mass for dinitrogen heptoxide?
3.
What is the definition of empirical formula?
4.
What is the empirical formula for C2H4O2?
5.
How many grams are in 157 moles of calcium?
6.
What is the molecular formula of Styrene that contains 92.3% C and 7.7% H by
mass and has a molar mass of 104 g/mol?
7.
What is the molecular formula of Monosodium glutamate (MSG) that contains
35.53% C, 4.77 % H, 37.85 % O, 8.29 % N, and 13.60 % Na, and has a molar
mass of 169 g/mol?
8.
How many moles of oxide ions are in 2.50 g of calcium oxide?
9.
What is the percentage composition of aluminum phosphate?
10.
What is the percentage composition of sodium nitrate?
11.
What is the molecular formula for a compound that is 46.16% carbon, 5.16%
hydrogen and 48.68% fluorine if the molar mass of this compound is 156.12 g?
Spring, 2016 Chemistry Review
12.
How many moles are in 243 grams of neon, a gas?
13.
What is the molar mass of 2NH4(NO3)?
14.
How many moles in 2.7 x 1032 atoms of antimony?
15.
What are the mathematical steps for determining the empirical formula of a
compound? What amount of grams do you use for the elements, if none are
given?
16.
What is the empirical formula for a compound that contains 1.18 mol Na, 1.18
mol N, and 3.53 mol O?
17.
What is the empirical formula for a compound that contains 82.98% K and
17.02% O by mass?
18.
What is the mathematical formula for determining the molecular formula from the
empirical formula?
19.
What is the empirical formula for glucose, which has a molecular formula of
C6H12O6?
20.
What is the percentage of lead in lead (III) chloride?
Spring, 2016 Chemistry Review
21.
One mole of scandium atoms has a mass of?
22.
How many moles are there in 46 grams of beryllium?
23.
What is the mass percentage of sodium in sodium chloride?
24.
What is the mass of 12.60 mol of sodium hydroxide NaOH?
25.
What is the empirical formula for a compound that contains 17.34% hydrogen
and 82.66% carbon?
26.
What is the definition of oxidation number?
What is the definition of a subscript in a chemical formula?
Where do you place the subscript?
When you are balancing a chemical reaction equation, what numbers do you
change?
Where do place them?
27.
What are the mathematical steps for determining the mass of a molecule?
Spring, 2016 Chemistry Review
In a beaker, 10.0 grams of sulfuric acid reacts with 12.5 grams aluminum
hydroxide by double replacement.
28.
Write the balanced double replacement reaction for the above scenario:
29.
What is the limiting reactant?
30.
What is the excess reactant?
31.
How much excess reactant is used up in the reaction with the limiting reactant?
32.
How much excess reactant is left over after the limiting reactant runs out?
33.
How much of each product are produced?
34.
Define “actual yield”
35.
Define “excess reactant”
36.
What is the definition of diatomic molecule? List the seven diatomic molecules:
Spring, 2016 Chemistry Review
37.
Write the balanced chemical equation for the synthesis reaction of sodium and
chlorine:
38.
Calculate the number of moles of aluminum oxide that are produced when 1.20
mols of Fe are produced in the following reaction.
Al(s) + FeO(s) → Fe(s) + Al2O3(s) EQUATION IS NOT BALANCED
39.
In the chemical formula, CO2, how many atoms of oxygen are represented?
How many mols of oxygen are represented?
How many mols of carbon dioxide are represented?
How many molecules of carbon dioxide are represented?
40.
Write the chemical formula for barium hydroxide:
42.
Write the balanced chemical reaction equation for the synthesis of water:
43.
Write an example of a synthesis reaction (balanced formulas and equation)
44.
Write an example of a decomposition reaction (balanced formulas and equation)
45.
What are the products in a combustion reaction?
Spring, 2016 Chemistry Review
46.
Define “theoretical yield”
47.
In the chemical equation N2(g) + 3H2(g)  2NH3(g) what is the mol to mol ratio of
nitrogen to ammonia?
48.
Define solute
Define solvent
Define solution
49.
Define suspension
Define colloid
50.
Define Brownian motion
Define Tyndall Effect