How many H atoms are present in 0.46 , g of e | vedclass

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Question

(A) The molar mass of ethanol $[C_2H_5OH]$ is $(2 	imes 12) + (6 	imes 1) + 16 = 46 \, g/mol$.Number of moles of ethanol $= \frac{	ext{Given mass}}

Vedclass · Accepted Answer

$3.6 	imes 10^{22}$

Vedclass · Answer

(A) The molar mass of ethanol $[C_2H_5OH]$ is $(2 	imes 12) + (6 	imes 1) + 16 = 46 \, g/mol$.Number of moles of ethanol $= \frac{	ext{Given mass}}{	ext{Molar mass}} = \frac{0.46 \, g}{46 \, g/mol} = 0.01 \, mol = 10^{-2} \, mol$.Each molecule of $C_2H_5OH$ contains $6$ hydrogen atoms.Therefore,the number of moles of $H$ atoms $= 6 	imes 10^{-2} \, mol$.Number of $H$ atoms $= 	ext{moles} 	imes N_A = 6 	imes 10^{-2} 	imes 6.022 	imes 10^{23} \approx 3.61 	imes 10^{22}$ atoms.Thus,the correct option is $A$.

How many $H$ atoms are present in $0.46 \, g$ of ethanol $[C_2H_5OH]$?

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