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