Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions of dollars a day. The actual process also requires water, but a simplified equation is:

$4Fe(s)+3O_2(g)2F{e}_2{O}_3(s),H_{rxn}=-1\mathrm{.}65{10}^{3}kJ$

Round each of your answers to $3$ significant figures.

Part $1$ of $2$

How much heat is released when $0\mathrm{.}250kg$ of iron rusts?

$kJ$

$10$

Part $2$ of $2$

How much rust forms when $5\mathrm{.}40{10}^{3}kJ$ of heat is released?

$gFe{F}_2{O}_3,m$