Mole study guide
0.0049 mol
# of moles in 0.50 g of sodium bromide (NaBr)
5.425 mol
A chemist plans to use 435.0 grams of ammonium nitrate (NH4NO3) in a reaction. how many moles of the compound is this?
19.9 g
Ca(C2H3O2)2 calculate the mass of carbon that can be obtained from 65.3 g of the compound
CCl4
Empirical formula of 7.8% carbon and 92.2% chlorine
Carbon 6 Hydrogen 12 Oxygen 6
How many atoms of each element are present in C6H12O6
empirical formula
The basic ratio that gives the lowest whole-number ratio of the atoms of the elements in a compound.
44 g/mol
What is the molar mass of CO2?
molecular formula
a whole number multiple of the empirical formula
molar mass
amount in grams of one mole of a compound or element
CHCl3
empirical formula of 10.0% C, 0.80% H, and 89.1% Cl
4.65 g
find the mass in grams of 1.00x1023 molecules of N2
add the masses together from the periodic table
how do you find molar mass
3.6x1023 molecules
how many atoms of zinc are in 0.60 mol of zinc
204 g
how many grams are in 0.658 mol of calcium phosphate Ca(PO4)2
5.85 mols
how many moles is 3.52x1024 molecules of water
6.02 x 1023
how many particles are in Avogadro's #
3.69x1021 particles
how many particles are there in 1.43 g of a molecular compound with a gram molecular mass of 233 g
310.18 g/mol
molar mas of Ca3(PO4)2
C= 10.1% H=0.79% Cl= 89.1%
sample consists of 5.34 g of carbon. 0.42 g of hydrogen, and47.08 g of chlorine. what is the percent composition of the compound
percent composition
shows relative amounts of elements in a compound
The elements and the # of each element in a compound
what does a chemical formula tell you about a compound?
Mole
what is the SI unit for the # of representative particles in a substance
% mass of element = (mass of element/total mass of compound)x100
what is the formula for percent composition
32 g
what is the mass of 1.00 mol of O2