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Vocabulary
Mass to Moles
Moles to Mass
Finding Empirical Formulas
Percent Composition
100
Moles are what?
What is base unit used to measure the amount of a substance(6.02 X 10^23)?
100
25.5 g Ag
What is 0.236 mol Ag
100
3.57 mol Al
What is 96.3g Al
100
Iron= 5.41 Titanium= 4.64 Oxygen= 4.65
FeTiO3
100
Find the percent mass of H2O
H= 11.21 % O= 88.79 %
200
Avogadro's number is what?
What is 6.02 X 10^23?
200
300.0 g S
What is 9.355 mol S
200
42.6 mol Si
What is 1.20 X 10^3 g Si
200
Fe= 72.36% O= 27.64%
Fe3O4
200
Al2(SO4)3
Al= 15.79% S= 28.07% O= 56.14%
300
Molar mass is what?
What is mass is grams of one mole of any pure substance?
300
34.2 g Sulfur
1.07 moles Sulfur
300
1.20 moles Carbon
14.4 g Carbon
300
C=43.3% H=1.2% O=38.6% N=16.9%
C3HO2N
300
NaHCO3
Na= 27.37% H= 1.2% C=14.3% O=57.14%
400
A hydrate is what?
What is a compound with a specific number of water molecules attached to its atoms?
400
15 g Lithium
0.46 moles Lithium
400
2.4 moles Sulfur
77 g Sulfur
400
C= 49.48% H= 5.19% N= 28.85% O= 16.48%
C8H10N4O2
400
Which has larger percent by mass of sulfur? a) H2SO3 b) H2S2O8
a) H2SO3
500
A representative particle is what?
What is an atom, molecule, formula unit, or ion?
500
Write the general conversion to find mass to moles.
mass X 1 mol -------- = moles grams
500
Write the general conversion to find moles to mass.
moles X grams ------- = grams 1 mol
500
C= 26.1% H= 4.3% O= 69.6%
CH2O2
500
Calculate the % composition of Magnesium Hydroxide
Mg= 41.7% O= 54.9% H= 3.4%