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

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(D) The molecular weight of ethanol $(C_2H_5OH)$ is $2 	imes 12 + 6 	imes 1 + 16 = 46 \, g/mol$. One molecule of $C_2H_5OH$ contains $6$ hydrogen at

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$3.6 	imes 10^{21}$

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(D) The molecular weight of ethanol $(C_2H_5OH)$ is $2 	imes 12 + 6 	imes 1 + 16 = 46 \, g/mol$. One molecule of $C_2H_5OH$ contains $6$ hydrogen atoms. Number of moles of $C_2H_5OH = \frac{0.046 \, g}{46 \, g/mol} = 0.001 \, mol = 10^{-3} \, mol$. Number of molecules of $C_2H_5OH = 10^{-3} 	imes 6.022 	imes 10^{23} = 6.022 	imes 10^{20}$. Number of $H$ atoms = $6 	imes (6.022 	imes 10^{20}) \approx 3.6 	imes 10^{21}$.

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

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