Unit 5 Quiz Review

Question

Calculate the empirical formula for a compound that, through experimental analysis was found to contain 2.20g sulfur and 7.81g fluorine.

____ g S		=	=

 

____ g F		=	=

Empirical Formula is S____ F_____.

Please fill in the answers in the boxes, and explain.

Answer 1

Write out each element

S: 2.20g

F: 7.87g

Divide by the molar mass

S: 2.20g/32.06=0.068621

F: 7.87g/18.998=0.41425

Divide both numbers by the smaller number

S: 2.20g/32.06=0.068621/0.068621=1

F: 7.87g/18.998=0.41425/0.068621=6

These are the subscripts

SF₆