What is the molecular formula of a compound if its empirical formula is cfbro and its molar mass is 381.01 g/mol?
a. cfbro
b. c2f2br2o2
c. c3f3br3o3
d. c2f3br2o3
e. c4f4br4o me

 C.

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.

Empirical formula is the simplest formula which depicts the whole number of atoms of each element present in the compound.

Given empirical formula:

Thus empirical mass= 12+19+80+16= 127 g

Given : Molar mass= 381.01 g

Now we have to calculate the molecular formula.

Thus Molecular formula is :

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.