Question

How many atoms are there in $1$ mole of $H_{2}O$?

• A. $3$
• B. $54$
• C. $6.02\times {10}^{23}$
• D. $2(6.02\times {10}^{23})$
• E. $3(6.02\times {10}^{23})$

Answer 1

The correct option is E $3(6.02\times {10}^{23})$

1 mole of $H_{2}O$ contains $3$ moles of atoms ( $2$ moles of $H$ atoms and $1$ mole of $O$ atoms).
1 mole of atoms corresponds to Avogadro's number of atoms which is $6.02\times {10}^{23}$.
3 moles of atoms corresponds to $3(6.02\times {10}^{23})$ atoms.