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 :

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.