Answer: The mass of water sample is 1.062 g
Explanation:
We are given:
Number of molecules of water = [tex]3.55\times 10^{22}[/tex]
According to mole concept:
[tex]6.022\times 10^{23}[/tex] number of molecules are present in 1 mole of a compound
So, [tex]3.55\times 10^{22}[/tex] number of molecules will be present in = [tex]\frac{1}{6.022\times 10^{23}}\times 3.55\times 10^{22}=0.059moles[/tex] of water.
To calculate the mass of a substance, we use the equation:
[tex]\text{Number of moles}=\frac{Given mass}}{\text{Molar mass}}[/tex]
Molar mass of water = 18 g/mol
Moles of water = 0.059 moles
Putting values in above equation, we get:
[tex]0.059mol=\frac{\text{Mass of water}}{18g/mol}\\\\\text{Mass of water}=1.062g[/tex]
Hence, the mass of water sample is 1.062 grams
