REVERSE MOLAR MASS
STOICHIOMETRY
QUESTIONS
MOLAR MASS
VOCAB
100
47.87 GRAMS
TITANIUM (Ti)
100
A sample contains 27.1 g of calcium oxide. How many moles of calcium oxide are in the sample?
0.483 MOL CaO
100
The number of things in one mole is the
Avogadro constant
100
O2
32 GRAMS
100
THE MASS IN ATOMIC MASS UNITS OF ONE MOLECULE OF A COVALENT COMPOUND
MOLECULAR MASS
200
63.55 GRAMS
COPPER (Cu)
200
How many atoms are in 0.652 mol of iron?
3.93*10^23 atoms Fe
200
How many moles of sucrose, C12H22O11, are in 1222 g of sucrose?
3.57 moles
200
N2
28 GRAMS
200
THE UNIT USED TO COUNT NUMBERS OF ATOMS, MOLECULES, OR FORMULA UNITS OF SUBSTANCES
MOLE
300
94.97 Grams
PHOSPHATE (PO4)
300
A solution of NaCl has a molarity of 0.549 M. How many moles are in 350. mL of this solution?
0.193 mol NaCl
300
Calculate the number of moles of hydrogen atoms in 4.75 mol sulfuric acid
9.50 mol
300
H2O
18
300
THE MASS OF ONE MOLE OF A PURE SUBSTANCES
MOLAR MASS
400
80.06 grams
Sulfite (SO3)
400
How many grams of sodium hydroxide are needed to make 250. mL of a 0.200 M solution?
4 grams NaOH
400
How many moles of magnesium atoms is 7.32 × 1026 atoms?
1.22 × 103 mol
400
S04
96 GRAMS
400
6.02*10^23
AVOGRADRO NUMBER
500
135.15 grams
Potassium Sulfate (KSO4)
500
If 120. g of propane, C3H8, is burned in excess oxygen, how many grams of water are formed?
196 grams H2O
500
What is the percent boron by mass in boric acid, H3BO3?
17.50%
500
C2H3O2
60 GRAMS
500
THE STUDY OF RELATIONSHIPS BETWEEN MEASURABLE QUANTITIES, SUCH AS MASS AND VOLUME, AND THE NUMBER OF ATOMS IN CHEMICAL REACTIONS
STOICHIOMETRY
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