Empirical/Molecular Formulas & Combustion Analysis CC.2 & CC.3

A molecular formula tells you...

• how many atoms of each element are in a compound

• how many protons are in an element

• the number of elements present in a compound

• how many neutrons are in an element

True or False: The empirical formula tells you the most reduced ratio of elements in a compound

• True

• False

The empirical formula for N2O4 is (a)  

(b)  

What is the molecular formula for C2H6O?

• C2O

• C6H18O3

• CO6

• CHO2

What is combustion analysis?

• method of reacting compounds

• method of breaking down elements

• method of the change in atoms in a compound

• method of determining chemical formula of substance that contain H, O, & C

A 12.501 g of petroleum compound produced 38.196g of CO2 and 18.752 of H2O. The empirical formula for this compound is...

(a)  

A hydrocarbon fuel combusted with 18.214 g of O to yield 23.118 g of CO2 and 4.729 g of H2O. Find the empirical formula

• CHO

• CH

• C2H2

• CH2