Answer :
Final answer:
To find the mass of H2O in grams for 0.20 mol, multiply the number of moles (0.20) by the molar mass of H2O (18.02 g/mol), which gives 3.604 g, rounding to 3.6 g. Option b.
Explanation:
To calculate the mass of H2O that is present in 0.20 mol, we can use the molar mass of H2O as a conversion factor. The given molar mass of H2O is 18.02 g/mol. By multiplying the number of moles by the molar mass, we can find the mass in grams.
So, the calculation would be:
Mass of H2O = number of moles × molar mass of H2O
Mass of H2O = 0.20 mol × 18.02 g/mol
Mass of H2O = 3.604 g
Therefore, the answer is 3.6 g, which corresponds to option b.
