Mole Formulas
How many moles are there in 24.0 grams of FeF3?
.213 Moles
A compound composed of: 72% iron and 27.6% oxygen by mass.
Fe3O4
A compound with an empirical formula of Li2CO3 and 73.8 grams/mole, what’s the molecular formula?
Li2CO3
Find the percent composition of lithium phosphide
Li 40.0% P 60.0%
Calculate. KOH
56.1 g/mol
How many grams are there in 1.00x1024 molecules of BCl3?
195 grams
A compound composed of: 9.93% carbon, 58.6% chlorine, and 31.4% fluorine.
CCl2F2
What is the molecular formula of a compound with an empirical formula of C2OH4 and a molar mass of 88 grams per mole.
C4O2H8
Find the percent composition of potassium cyanide
% K 60.1 % C 18.4 % N 21.5
Calculate. BeCl2
80 g/mol
How many molecules are there in 9.34 grams of water?
3.12x1023 molecules
A compound composed of: .556g carbon and .0933g hydrogen.
CH2
What is the molecular formula of a compound with an empirical formula of C4H4O and a molar mass of 136 grams per mole?
C8H8O2
Find the percent composition of manganese (III) nitrate
% Mn 22.8 % N 17.4 % O 59.8
Calculate. CCl2F2
121 g/mol
How many grams are in 2.30x1024 atoms of silver?
412 grams
A compound composed of: 88.8% copper; 11.2% oxygen
Cu2O
What is the molecular formula of a compound with an empirical formula of CFBrO and a molar mass of 254.7 grams per mole?
C2F2Br2O2
Find the percent composition for beryllium nitride
% Be 49.1 % N 50.9
Calculate. SO2
64.1 g/mol
How many molecules are there in 122 grams of NO2?
1.60 x 1024 molecules
A compound composed of: 40% carbon; 6.7% hydrogen; 53.3% oxygen
CH2O
What is the molecular formula of a compound with an empirical formula of C2H8N and a molar mass of 46 grams per mole?
C2H8N
Find the percent composition of iron (II) phosphate
% Fe 46.8 % P 17.3 % O 35.8
Calculate. CH3COOH
60 g/mol