Given:

Atmospheric Pressure $358\mathrm{.}1mmHg$

Room temperature. $10\mathrm{.}05C$

trial $1$

Mass of $mg=0\mathrm{.}00425g$

Measurement before reaction $1\mathrm{.}45ml$

Measurement after reaction $=5\mathrm{.}70ml$

Trial $2$

Mass of $mg=0\mathrm{.}00405g$

Measurement before reaction $1\mathrm{.}30ml$

Measurement after reaction $=5\mathrm{.}10ml$

Trial $3$

Mass of $mg=0\mathrm{.}00485$

Measurement before reaction $=3\mathrm{.}35ml$

Measurement after reaction $=7\mathrm{.}75ml$

For trial $1,2$ and $3$

a$.$ Find the $.$pre.ss$.$ure of $H2$ gas and $.$vo$.$lume. of $H2$ gas collected

b$.$ Find the mo$.$le$.$s of $Mg$ and mo$.$les. of $H2$ gas

c$.$ Find The molar mass of $mg.$

d$.$ If $Fe$ is use instead of $mg$ me$.$tal. calculate vo$.$lum.e $H2$ gas. pro.duced from $0\mathrm{.}02755$

$g$ of Fe metal. Given

$2F{e}_{(s)}+6HC{l}_{(aq)}2F{e}_{(aq)}^{3+}+3H_{2(g)}$