Question

What would be the mass of 1.98 * 10^(28) molecules of H2O

Answer 1

The molar mass of H2O is approximately 18.015 g/mol.

To calculate the mass of 1.98 * 10^28 molecules of H2O, we need to first calculate the number of moles of H2O represented by that many molecules:

1.98 * 10^28 molecules H2O / 6.022 * 10^23 molecules/mol = 32.9 mol H2O

Next, we can use the molar mass of H2O to convert from moles to grams:

32.9 mol H2O * 18.015 g/mol = 591.6 g

Therefore, the mass of 1.98 * 10^28 molecules of H2O is approximately 591.6 grams

Answer 2

Answer: The mass of water would be 5.918 x 10 to the power of 5 g
Step-by-step explanation:
According to the mole concept:
1 mole of a compound contains number of molecules which determines the molar mass of that compound.
Mass of water for 1 mole is 18 grams.