How many moles of oxygen will be produced if 27.6 grams of Al are produced?
A) 1.02 mol
B) 0.256 mol
C) 0.767 mol
D) 24.6 mol
E) 12.3 mol

Question

How many moles of oxygen will be produced if 27.6 grams of Al are produced? 
A) 1.02 mol 
B) 0.256 mol 
C) 0.767 mol 
D) 24.6 mol 
E) 12.3 mol

Quizplus · Accepted Answer

The chemical equation for the reaction is:

4Al + 3O2 -> 2Al2O3

From the equation, we can see that 4 moles of aluminum react with 3 moles of oxygen to produce 2 moles of aluminum oxide.

Using the molar mass of aluminum (27 g/mol), we can calculate the number of moles of aluminum:

27.6 g Al / 27 g/mol = 1.02 mol Al

Since the mole ratio of Al to O2 is 4:3, we can set up a proportion to find the number of moles of oxygen produced:

1.02 mol Al / 4 mol O2 = x / 3 mol O2

Solving for x, we get:

x = 0.767 mol O2

Therefore, the answer is choice C.

How Many Moles of Oxygen Will Be Produced If 27