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# Molecular Formula of a Compound

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1. What is the molecular formula of a compound? See attached file for full problem description.

https://brainmass.com/chemistry/general-chemistry/molecular-formula-compound-104145

#### Solution Preview

Let the formula be CxHyNzOt
MW = 12x+y+14z+16t
We have:
(1)
(2)
(3)
(4)

Take (1) divide by (2):

Take (1) divide by (3):
...

#### Solution Summary

The solution provides detailed discussions and analysis for the problem.

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## Determining Molecular Formulas and Compounds

1. A 0.1014 g sample of purified glucose was burned to produce 0.1486 grams of carbon dioxide and 0.09 g of water. Glucose contains only C,H,and O. Determine the empirical formula of glucose. If the molecular mass of glucose is 180, what is the molecular formula of glucose.

2. A granulated sample of aircraft alloy (Mg, Al, Cu) weighing 8.72 g was first treated with alkali to remove the aluminum and then with HCl(aq) to remove the magnesium, leaving a 0.9 g residue of Cu. If 6.067 g of aluminum hydroxide were recovered from the alkali treatment, what is the elemental mass percent composition of the alloy?

3. Name the following compounds:
a. I2O7
b. Na3PO4
c. Hg2(CN)2
d. Cr2(CrO4)3
e. MgCr04
f. BeH2
g. GaP
h. Pb(C2O4)2

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