10

20

30

40

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

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

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

All of these

36 g of water

28 g of carbon monoxide

46 g of ethyl alcohol

54 g of Nitrogen pentoxide

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

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

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

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

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

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

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

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

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

O⁻²

Na⁺

F⁻

All the given species have same number of electrons

$8g\,C{H_4}$

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

$25g\,CaC{O_3}$

$28g\,CO$

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

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

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

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

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

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

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

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

Twice that in 60 g carbon

$6.023 imes {10^{22}}$

Half in 8 gr of He

$558.5 imes 6.023 imes {10^{23}}$