$16{\rm{g}}{{\rm{O}}_2},14{\rm{g}}{{\rm{N}}_2}$

$8{\rm{g}}{{\rm{O}}_2},22{\rm{g}}{{\rm{N}}_2}$

$28{\rm{g}}{{\rm{N}}_2},22{\rm{g C}}{{\rm{O}}_2}$

$32{\rm{g}}{{\rm{O}}_2},32{\rm{g}}{{\rm{N}}_2}$

36 g of water

28 g of carbon monoxide

46 g of ethyl alcohol

54 g of Nitrogen pentoxide

$1g\,\,of\,C{O_2}\left( g \right)$

$1g\,of\,{C_8}{H_{18}}\left( l \right)$

$1g\,of\,{C_2}{H_6}\left( g \right)$

$1g\,of\,LiF\left( s \right)$

$8g\,C{H_4}$

$8g\,{C_6}{H_{12}}{O_6}$

$25g\,CaC{O_3}$

$28g\,CO$

1g of butane $({C_4}{H_{10}})$

1g of Nitrogen $\left( {{N_2}} \right)$

1g of Silver $\left( {Ag} \right)$

1g of Water $\left( {{H_2}O} \right)$

$6.023\,\, imes \,\,{10^{^{25}}}$

$6.023\,\, imes \,\,{10^{^{24}}}$

$6.023\,\, imes \,18\,\, imes \,\,{10^{^{23}}}$

$6.023\,\, imes \,\,{10^{^{23}}}$

$18 imes {10^{23}}$ electrons

$6.023 imes {10^{23}}$ electrons

$3.01 imes {10^{23}}$ electrons

$9 imes {10^{23}}$ electrons

$4{\rm{g}}\;{\rm{of}}{\mkern 1mu} \;{{\rm{H}}_2}{\rm{O}}$

$2{\rm{g}}\;{\rm{of}}\;{\rm{marsh}}\;{\rm{gas}}$

4{\rm{g}}\;{\rm{of}}{\mkern 1mu}  \;{\rm{PC}}{{\rm{l}}_5}

$2{\rm{g}}\;{\rm{of}}\;{\rm{phosgene}}$

$\,{\rm{1}}{{\rm{0}}^{{\rm{ - 3}}}}\,{\rm{mol}}\,\,{\rm{of}}\,{\rm{water}}$

${\rm{18}}\,{\rm{mL}}\,{\rm{of}}\,{\rm{water}}$

$\,{\rm{0}}{\rm{.00224}}\,{\rm{L}}\,\,{\rm{of}}\,{\rm{water}}\,{\rm{vapours}}\,\,{\rm{at 1 atm }}\,{\rm{and }}\,{\rm{273}}\,\,{\rm{K}}$

${\rm{0}}{\rm{.18}}\,\,{\rm{g}}\,\,{\rm{of}}\,\,{\rm{water}}$

18 ml of water

0.18 g of water

0.00224 L of water vapour at 1 atm and 273 K

${10^{ - 3}}$ mol of water

$7.22 imes {10^{24}}$ atoms

$7.22 imes {10^{23}}$ atoms

$7.22 imes {10^{25}}$ atoms

All of these