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Q.
Which of the following has the highest mass ?
Some Basic Concepts of Chemistry
Solution:
Molar mass of $CO_{2}=44\,g\,mol^{-1}$
$\therefore $ 4 mol of $CO_{2}=44\times4 = 176\,g$
(C) $6.02\times 10^{23}$ atoms of hydrogen has mass
$=1.008\,g$
$12\times 10^{24}$ atoms of hydrogen has mass
$=20.1\,g$
(D) $22.4\,L$ of helium at $N.T.P.$ has mass $= 4\, g$
$11.2\, L$ of helium at $N.T.P.$ has mass $= 2\, g$
Thus $4$ moles of $CO_{2}$ has maximum mass