If one atom of an element X weighs 6.643 time | vedclass

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(C) Step $1$: Calculate the mass of one mole of element $X$ (molar mass).Mass of one atom = $6.643 	imes 10^{-23} \ g$.Molar mass = Mass of one atom

Vedclass · Accepted Answer

$1250$

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(C) Step $1$: Calculate the mass of one mole of element $X$ (molar mass).Mass of one atom = $6.643 	imes 10^{-23} \ g$.Molar mass = Mass of one atom $	imes$ Avogadro's number $(N_A)$.Molar mass = $(6.643 	imes 10^{-23} \ g) 	imes (6.022 	imes 10^{23} \ mol^{-1}) \approx 40 \ g/mol$.Step $2$: Calculate the number of moles in $50 \ kg$ $(50,000 \ g)$.Number of moles = $\frac{	ext{Given mass}}{	ext{Molar mass}} = \frac{50,000 \ g}{40 \ g/mol} = 1250 \ moles$.

If one atom of an element $X$ weighs $6.643 \times 10^{-23} \ g$,then find the number of moles of atoms in $50 \ kg$ of element $X$. (in $moles$)

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