Definitions
Molar Mass
Conversion
% Composition
Empirical Formulas
100
How many particles are in 1 mole of something?
6.02 x 10 23 particles
100
What is the molar mass of H2O?
18
100
How many moles are in 36 grams of water?
2 moles
100
What is the percent composition of ducks in the picture?
50%
100
What is the empirical formula for a compound that has 2.00 moles of A and 4.00 moles of B?
AB2
200
What is another name for "The Mole?"
Avogadro's Number
200
What is the molar mass of CO2 ?
44
200
How many atoms are in 3 moles of Oxygen Gas?
1.806 x 10 24 atoms
200
Find the percentage composition by mass of Fe in Fe2O3
70%
200
Suppose that 36.45 g Mg were reacted with 106.35 g Cl. What is the empirical formula?
MgCl2
300
What day of the year is Mole Day?
October 23rd
300
What is the molar mass of Zn(OH)₂ ?
99
300
A lab experiment calls for 4.5 moles of ZnCl2. How many grams of ZnCl2 will you use?
613 g
300
What is the percent composition of Hydrogen in Dihydrogen Monoxide?
11-12%
300
The empirical formula for a compound is NO2 which has a mass of 46 amu’s. Laboratory procedures have determined that the molecular mass of the compound is 138 amu’s, which is 3 times larger than 46 amu’s. Based on the relationship of the data, what would the molecular formula for the compound be?
N3O6