Question

Find the number of moles of $CaS{O}_4.2H_{2}O$ present in $3.011\times {10}^{24}$ formula units of $CaS{O}_4.2H_{2}O$

• A. 10
• B. 5
• C. 1
• D. 15

Answer 1

The correct option is B 5

Number of moles $=\frac{numberofformulaunits}{Avogadronumber}=\frac{3.011\times {10}^{24}}{6.022\times {10}^{23}}=5moles$