Question

what is the mass of 2 moles of water molecules​

Answer 1

Answer:

If we have one mole of water, then we know that it will have a mass of 2 grams (for 2 moles of H atoms) + 16 grams (for one mole O atom) = 18 grams.

Answer 2

The molecular mass of two moles of water($H_{2}O$) molecules is 36 grams.

Step-by-step procedure

Given:

number of moles= 2 moles

To find:

The molecular mass of 2 moles of water molecules

Each $H_{2}O$ atom is constituted of 2 Hydrogen atoms and a single Oxygen atom.

Mass of one Hydrogen atom= 1 gm

Mass of one oxygen atom= 16gm

Mass of one mole of the $H_{2}O$ molecule = 2 x 1 + 16

= 18 gm

Then, the mass of 2 moles of water = 2 x the mass of one mole of water

= 2 x 18

36 gm

Result:

Thus, the calculated molecular mass of two moles of water($H_{2}O$) is 36 grams.