A total of 2 mol iron oxide has a mass of

319.4

Explanation:

just multiply the number by 2 mol and you will get your answer

320 g.

Explanation:

The formula of iron oxide is Fe₂O₃.

1 mole of a compound contains a mass equivalent to the relative formula mass of that particular compound. Atomic mass of Iron = 56, while that of oxygen is 16.

Total mass of the compound will be = (56 * 2) + (16 * 3)

= 112 + 48

= 160

For 2 mole of the compound i. e 2 Fe₂O₃ the mass will be = 160 * 2

=320 g.

Result: 2 mole of Iron oxide has a mass of 320 g.