Answer: There are [tex]1.11\times 10^{23}[/tex] atoms of Sr
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{16.1g}{87.6g/mol}=0.184moles[/tex]
1 mole of Sr contains = [tex]6.023\times 10^{23}[/tex] atoms of Sr
Thus 0.184 moles of Sr contains = [tex]\frac{6.023\times 10^{23}}{1}\times 0.184=1.11\times 10^{23}[/tex] atoms of Sr
Thus there are [tex]1.11\times 10^{23}[/tex] atoms of Sr
