Answer:
127.3 g
Explanation:
Data Given
mass of O₂= 97 g
mass of C₆H₆O₃ = ?
Reaction Given:
C₆H₆O₃ + 3O₂ --------> 6CO + 3H₂O
Solution:
First find the mass of C₆H₆O₃ from the reaction that it combine with how many grams of oxygen (O₂).
Look at the balanced reaction
C₆H₆O₃ + 3O₂ --------> 6CO + 3H₂O
1 mol 3 mol
So 1 mole of C₆H₆O₃ combine with 3 moles of O₂
Now
convert the moles into mass for which we have to know molar mass of C₆H₆O₃ and O₂
Molar mass of C₆H₆O₃
Molar mass of C₆H₆O₃ = 6(12) + 6(1) +3(16) = 72 + 6 + 48
Molar mass of C₆H₆O₃ = 126 g/mol
mass of C₆H₆O₃
mass in grams = no. of moles x molar mass
mass of C₆H₆O₃ = 1 mol x 126 g/mol
mass of C₆H₆O₃ = 126 g
Molar mass of O₂ = 2(16)
Molar mass of O₂= 32 g/mol
mass of O₂
mass in grams = no. of moles x molar mass
mass of O₂ = 3 mol x 32 g/mol
mass of O₂ = 96 g
So,
96 g of O₂ combine with 126 g of C₆H₆O₃ then how many grams of C₆H₆O₃ will combine with 97.0grams of O2
Apply unity Formula
96 g of O₂ ≅ 126 g of C₆H₆O₃
97 g of O₂ ≅ X g of C₆H₆O₃
By cross multiplication
X g of O₂ = 126 g x 97 g / 96 g
X g of O₂ = 127.3 g
127.3 g of C₆H₆O₃ will combine with 97 g of O₂
So
mass of C₆H₆O = 127.3 g
