1:1

2:3

3:2

4:3

${\rm{1}}\,\,{\rm{g}}$of ${\rm{Ag}}\,\left( {\rm{s}} \right)$ [ Atomic mass of $Ag = {\rm{ }}108$ ]

${\rm{1}}\,\,{\rm{g}}$ of ${\rm{Mg}}\,\left( {\rm{s}} \right)$ [ Atomic mass of $Mg = {\rm{ }}24$ ]

${\rm{1}}\,\,{\rm{g}}$ of ${{\rm{O}}_{\rm{2}}}\left( {\rm{g}} \right)$ [ Atomic mass of $O = {\rm{ 16}}$ ]

${\rm{1}}\,\,{\rm{g}}$ of ${\rm{Li}}\,\left( {\rm{s}} \right)$ [ Atomic mass of $Li = {\rm{ 7}}$ ]

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

1 mol

0.5 mol

2 mol

0.2 mol

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

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

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

All of these

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

${\rm{1}}\,\,{\rm{g}}$of ${\rm{Ag}}\,\left( {\rm{s}} \right)$ [ Atomic mass of $Ag = {\rm{ }}108$ ]

${\rm{1}}\,\,{\rm{g}}$ of ${\rm{Mg}}\,\left( {\rm{s}} \right)$ [ Atomic mass of $Mg = {\rm{ }}24$ ]

${\rm{1}}\,\,{\rm{g}}$ of ${{\rm{O}}_{\rm{2}}}\left( {\rm{g}} \right)$ [ Atomic mass of $O = {\rm{ 16}}$ ]

${\rm{1}}\,\,{\rm{g}}$ of ${\rm{Li}}\,\left( {\rm{s}} \right)$ [ Atomic mass of $Li = {\rm{ 7}}$ ]