Empirical And Molecular Formulas Question Preview (ID: 63194)


Practice Finding Empirical Formulas From Percent Compositions. TEACHERS: click here for quick copy question ID numbers.

The formula with the simplest ratio of atoms is called
a) chemical formula
b) empirical formula
c) molecular formula
d)

The formula showing the actual number of atoms in a compound is
a) chemical formula
b) empirical formula
c) molecular formula
d)

You can find the empirical formula using
a) percent composition
b) the chemical formula
c) fruit loops
d)

Determine the empirical formulas for compounds with the following percent compositions: 15.8% carbon and 84.2% sulfur
a) CS2
b) C2S4
c) C3S6
d)

Determine the empirical formulas for compounds with the following percent compositions:
a) CHO
b) CH2O
c) CH3O
d)

Calculate the empirical formulas of Saran Polymer: 24.8% C, 2.0% H, 73.1% Cl
a) CHCl
b) C2H2Cl
c) CH3Cl
d)

Find the EF of polystyrene; 92.3% C, 7.7% H
a) CH
b) C2H2
c) CH2
d)

What is the first step in finding the empirical formula?
a) Find the moles
b) Assume the percent is out of 100 and change to grams
c) Divide by the smallest
d)

Which is an empirical formula?
a) C3H3O6
b) C6H12O6
c) CH2O
d)

The molecular formula can also be the empirical formula
a) true
b) false
c)
d)

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