How many H atoms are present in 0.046 g of e | vedclass

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(D) 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{0.046 \ g}{46 \ g/mol}

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$3.6 	imes 10^{21}$

Vedclass · Answer

(D) The molar mass of ethanol $(C_2H_5OH)$ is $2 	imes 12 + 6 	imes 1 + 16 = 46 \ g/mol$. Number of moles of ethanol = $\frac{0.046 \ g}{46 \ g/mol} = 0.001 \ mol = 10^{-3} \ mol$. Each molecule of $C_2H_5OH$ contains $6$ hydrogen atoms. Total number of $H$ atoms = $	ext{moles} 	imes N_A 	imes 6 = 10^{-3} 	imes 6.022 	imes 10^{23} 	imes 6$. Total number of $H$ atoms = $36.132 	imes 10^{20} \approx 3.6 	imes 10^{21}$.

How many $H$ atoms are present in $0.046 \ g$ of ethanol $(C_2H_5OH)$?

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