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 P2Oand  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