Moles
Molarity
Percent Comp
Empirical/Molecular formula
Random
100
How many moles are in 2.91 X 1022 atoms of He
0.0483 moles
100
0.444 mol of CoCl2 in 0.654 L of solution
0.679 M
100
CuBr2
Cu: 28.4%
Br: 71.6%
100
A compound is 92.3% carbon and 7.7% hydrogen
CH
100
Formula for Density
D=M/V
200
How many moles are there in 24.0 grams of FeF3
.2127mol
200
Formula for Molarity
M=mols/L
200
HCl
H: 3%
Cl:97%
200
The simplest form of a chemical compound
Empirical Formula
200
Avogadro Number
6.022X 1023
300
How many molecules are in 2.00 moles of H2O?
1.20x1024 molecules H2O
300
98.0 g of phosphoric acid, H3PO4, in 1.00 L of solution
1.00 M
300
NaOH
Na: 57.5%
O: 40.0%
H: 2.5%
300
A compound has a molecular mass of 54 and an empirical formula of C2H3. what is the molecular formula?
C4H6
300
Density of calcium with a mass of 45g and a volume of 12L
3.75
400
How many grams are there in 7.40 moles of AgNO3?
1256.87 g
400
0.2074 g of calcium hydroxide, Ca(OH)2, in 40.00 mL of solution
0.06998 M
400
(NH4)3PO4
N: 28%
H: 8%
O: 43%
P: 21%
400
What is the molecular formula of a compound with the empirical formula of P2O5 and mass of 284
P4O10
400
What number on the element square do we use to help us find moles
Mass number or bigger number
500
How many atoms are in 1.50 moles of Hg
9.03x1023 atoms Hg
500
A 2.00-L bottle of a solution of concentrated HCl was purchased for the general chemistry laboratory. The solution contained 868.8 g of HCl. What is the molarity of the solution?
11.9 M
500
N: 41.1%
H: 11.8%
S: 47.1%
(NH4)2S
500
A compound Contains 40% Ca, 12% C and 48% O by mass. What is the empirical formula
CaCO3
500
what type of forces hold water molecules together
Hydrogen bonding