In which type of reaction is an atom of one element converted to an atom of a different element?
(1) decomposition (3) saponification
(2) neutralization (4) transmutation

267.14 iron oxide.

Explanation:

Given that

We know that molecular mass of iron-oxide = 160 g/mole.

We know that molecular mass of iron = 56 g/mole.

From the above reaction we can say that

1 mole of iron -oxide produce 2 mole of iron

160 gm of iron oxide produce 112 gm of iron

So

1 gm of iron required of iron oxide

Therefore

187 gm of iron required of iron oxide.

Therefore 187 gm of iron required 267.14 iron oxide.