Question

Fe2o3+2al⟶al2o3+2fe. Calculate the mass of iron metal

Answer 1

Answer:

according to the law of mass

weight of reactants = weight of products

weight of fe203+ weight of 2al =weight of al2o3 + weight of 2fe

weight of (fe2o3 +2al -al2o3)= weight of 2fe

2*56+3*16 +2*27-(2*27+3*16)=weight of 2fe

112+48 +54-54-48=weight of fe

112 =weight of fe

one more method is

as the given chemical reaction is balances

there are 2 moles of fe

mass of 1 mole of fe =56g

mass of 2 moles of fe = 56 *2 =112 g

Explanation: