Question

What is the mass of $5$ moles of sodium carbonate (${Na}_2{CO}_3$)?
($Na=23$ u; $C=12$ u; $O=16$ u)

Answer 1

molecular mass if $N{a}_{2}C{o}_3$

$=2\times 23\times 12+3\times 16$

$=46+12+48$

$=106$

no.of mole $=\frac{Givenwt.}{molecularwt.}$

$5=\frac{wt}{106}$

Required.$wt=s30$