Mole Map and misc
How do we find the molar mass of a compound?
Add up the individual atomic masses of all of individual elements that make up that compound
What is the percent composition of Br in NaBr
What is 77.6%
The number of moles in 45 g of lithium
What is 6.5 moles?
The number of moles in 4.96 X 1023 atoms of lead
What is 0.824 moles or
8.24 X 10-1 moles
The molar mass of methane (CH4)
16.0 g/mol
The Empirical Formula of?
Hg2F2
What is HgF
The empirical formula of a compound that is 5.9265% hydrogen and 94.0735% oxygen
What is HO
The molecular formula of a compound with a molar mass of 70.0 and an empirical formula of CH2
What is C5H10
How many liters are in a mole of ANY gas at STP? (look at the mole map)
What is 22.4 Liters?
the percent composition of H3PO4?
What is 3.1%H, 31.6%P, 65.3%O
5.93g is how many moles of zinc chloride ?
What is the mass of 4.33 X 10-2 (O.0433) mol of zinc chloride(ZnCl2)?
The number of water molecules in 75 Grams of water
What is 2.5 x 10 24 Molecules
The molar mass of Ca3N2
What is 148.3 g/mol
The Empirical Formula of
C10H22
What is C5H11
The empirical formula of a compound composed of: .556g carbon and .0933g hydrogen.
CH2
A compound with an empirical formula of C2H8N and a molar mass of 46 grams per mole.
C2H8N
To convert from grams to molecules, how many steps are necessary?
What is 2 steps?
The % composition of Mg in magnesium hydroxide
What is 41.7%
The number of grams in 0.135 moles of cadmium sulfate
What is 28.1 g of CdSO4
The number of molecules in 4.80 grams of nitrogen
What is 1.03 x 10 23 molecules
The Molar Mass of Mg(NO3)3
148.3 g/mol
The empirical Formula of
P4O6
What is P2O3
The empirical formula of a compound composed of 8.81 g of Carbon and 91.2 g of chlorine?
What is C2Cl7
A compound with an empirical formula of C2OH4 and a molar mass of 89.0 g/mol
What is C4O2H8
The number of molecules in 0.595 mol of anything
What is 3.58x1023 molecules
Is the percent composition of O larger in Carbon dioxide or nitrogen dioxide
What is CO2
The number of atoms in 2.2 mol of C
What is 1.3 X 1024 atoms
The number of grams in 6.42 X 1023 formula units of aluminum oxide
What is 109 grams
The molar mass of aluminum nitrate
What is 213.0g/mol ?
The Empirical Formula of C6H6O2?
What is C3H3O
The empirical formula of a compound composed of: 9.93% carbon, 58.6% chlorine, and 31.4% fluorine.
What is CCl2F2
The molecular formula for a compound with an empirical formula of C4H4O and a molar mass of 136.0 grams per mole.
What is C8H8O2
True/False: a mole of any element has the same mass?
What is False?
What is the formula for determining the Percent Composition?
Mass of the Element / Mass of the Compound
The Multiple by 100
the number of atoms are 145 grams of ammonia ?
What is 2.05 X 1025 Atoms
How many atoms are in 428 grams of glucose (C6H12O6)
What is 3.44 X 1025 atoms
The molar mass of Ammonium bromide
What is 97.9 g/mol
The empirical formula of?
CH2OHCH2OH
What is CH3O
The empirical formula of a compound composed of: 72% iron and 27.6% oxygen by mass.
What is Fe3O4
The molecular formula of a compound with an empirical formula of CFBrO and a molar mass of 254.7 grams per mole.
C2F2Br2O2