Which of the following contains more number of moles of the substance in it

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Which of the following contains more number of moles of the substance in it

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89.6 ltrs of oxygen at S.T.P.

130 gms of Carbon dioxide

12 gms of Hydrogen

90 gms of water

answer is D.

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Detailed Solution

$n_{water} = \frac{90}{18} = 5 moles$

$n_{{co}_{2}} = \frac{130}{44} = 2.98 moles$

$n_{o_{2}} = \frac{89.6 lt}{22.4 lt} = 4 moles$

$n_{H_{2}} = \frac{12}{2} = 6 moles$

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