Question

How many oxygen atoms are present in 2 gram-atoms of $O$?

• A. $12.044\times {10}^{23}$
• B. $2.26\times {10}^{23}$
• C. $3.011\times {10}^{23}$
• D. $6.022\times {10}^{23}$

Answer 1

The correct option is A $12.044\times {10}^{23}$

1 gram atom of $O=6.022\times {10}^{23}$ atoms of $O$
So, 2 gram atoms of $O=2\times 6.022\times {10}^{23}$ atoms of $O$
$=12.044\times {10}^{23}$ atoms of $O$