Calculate it
Calculate the number of moles in 1.66 x 1024 molecules of O2.
2.76 moles
The empirical formula of a compound is CCl3. The molar mass of the molecular
compound is 237 g/mol. Find the molecular compound.
C2Cl6
Atomic mass of Sn.
118.7 grams
1 mole=
6.022 x 10^23
How many moles are there in a sample of
0.56 grams of Hydrogen gas?
0.28 moles of H2
What is the mass of 1.50 moles of Copper (II) Bromide?
335 grams
Find the molecular formula of a compound that contains 56.36 g of oxygen and
43.64 g of phosphorus and has a molar mass of 283.9 g/mol.
P4O10
Atomic mass of Fe.
56.0 grams
Moles abbreviation is
Mol
What is used with Ionic Formulas.
Formula Units
A container of CO2 at STP has a volume of 125 L. How many moles are in the
container?
5.58 moles
A compound has a molar mass of 86.0 g/mol and has the percent composition by
mass of 55.8% C, 37.2% O and 7.0% H. Determine the molecular formula.
C4H6O2
Molar mass of CO2.
44.0 grams
1 mole=
Atomic mass in grams of any element.
Percent is determined by dividing...
Part by whole
How many atoms would 130.28 L of oxygen gas at STP contain?
7.00 x 10^24
A sample of Vanadium metal has a mass of 0.3546 g. It reacts with a sample of O
with a mass of 0.2784 grams. Find the empirical formula for the product that
results.
V2O5
98.0 grams
1 mole of any element=
It’s mass in grams.
What percent by mass of water is composed
of H?
11%
A 0.0250 g mass of F2 gas at STP would occupy what volume?
0.0147 Liters
Find the empirical formula of a compound that is found to be 47.9g Zn and 52.1g
Cl.
ZnCl2
Atomic mass of Rb.
35.5
Definition of percent composition.
The percent by mass of each element in a compound.
Molecular formulas give the ____ _______ of each kind of atom present in to compound.
Actual number