What mass of oxygen forms from 71.89 g CO2?
Use the periodic table to find molar masses.
71.89 g CO2 =
gO₂
rom
DONE
2.18

Explanation:

1. Molar masses

(a) CO₂

1 C =  1 ×  12.01 u =  12.01 u

2 O = 2 × 16.00 u = 32.00 u

                 TOTAL = 44.01 u

(b) O₂

2 O = 2 × 16.00 u = 32.00 u

2. Mass of oxygen produced

We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

Mᵣ:    44.01         32.00

         CO₂ ⟶ C + O₂

m/g:  71.89

So, 32.00 g of oxygen form from 44.01 g of CO₂  

h let me think