Answer: The number of molecules present in given amount of water are [tex]1.54\times 10^{23}[/tex]
Explanation:
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
Given mass of water = 4.6 g
Molar mass of water = 18.0 g/mol
Putting values in above equation, we get:
[tex]\text{Moles of water}=\frac{4.6g}{18.0g/mol}=0.255mol[/tex]
According to mole concept:
1 mole of a compound contains [tex]6.022\time 10^{23}[/tex] number of molecules.
So, 0.255 moles of water will contain [tex]0.255\times 6.022\times 10^{23}=1.54\times 10^{23}[/tex] number of molecules.
Hence, the number of molecules present in given amount of water are [tex]1.54\times 10^{23}[/tex]
