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Percent Composition
Molar Mass
Writing EF from MF
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Super spectacular molecular formulas
100
What is the percent composition of Br in NaBr
77.7%
100
What is the molar mass of CH3
15 g/mol
100

What is the EF from the MF of

P4O6

P2O3

100

A compound composed of: 72% iron and 27.6% oxygen by mass.

Fe3O4

100

Write the molecular formulas of the following compounds:

A compound with an empirical formula of C2OH4 and a molar mass of 88 grams per mole

C4O2H8

200
the percent composition of phosphoric acid(H3PO4)?
What is 3.08%H, 31.61%P, 65.31%O
200
What is the molar mass of NH3OH
34 g/mol
200

What is the EF from the MF?

 CH2OHCH2OH

CH3O

200

A compound composed of: 9.93% carbon, 58.6% chlorine, and 31.4% fluorine.

CCl2F2

200

Write the molecular formulas of the following compounds:

A compound with an empirical formula of C4H4O and a molar mass of 136 grams per mole.

C8H8O2

300
The % composition of Na in NaBr
What is 22.3%
300

What is the Molar Mass of H3PO4

98 Grams

300

What is the EF from the MF?

C6H9

C2H3

300

A compound composed of: .556g carbon and .0933g hydrogen.

CH2

300

Write the molecular formulas of the following compounds:

A compound with an empirical formula of CFBrO and a molar mass of 254.7 grams per mole.

C2F2Br2O2

400
Is the percent composition of O larger in CO2 or NO2
What is CO2
400
the molar mass of C6H6
78g/mol
400

What is the EF from the MF?

C10H22

C5H11

400

A compound with a molecular mass of 70g/mol and an empirical formula of CH2.

C5H10

400

Write the molecular formulas of the following compounds:

A compound with an empirical formula of C2H8N and a molar mass of 46 grams per mole.

C2H8N

500

Define Percent Composition

Mass of the Element / Mass of the Compound 

The Multiple by 100

500
What is the molar mass of SO4
96 g/mol
500

What is the EF from the MF?

Hg2F2

HgF

500

A compound with a molecular mass of 46.0g/mol and an empirical formula of NO2

NO2

500

What is the Molecular Formula?

The Molecular Formula is the true formula based off the Molar Mass of the Compound