Question

How many moles are in 15.94g of water?

305,3 mol H20
1,063 mol H20
0,8856 mol H20
16,94 mol H20

Answer 1

To find the number of moles in 15.94g of water, divide the mass by the molar mass of water (18.015 g/mol), resulting in 0.8856 moles of H₂O.

Step-by-step explanation:

To calculate the number of moles in 15.94g of water (H₂O), we use the molar mass of water as a conversion factor from mass to moles. The molar mass of water is calculated by adding the atomic masses of hydrogen and oxygen, which is (1.0079 + 1.0079 + 15.999) = 18.015 g/mol. To find the number of moles from the mass, we divide the mass of water by its molar mass:

Number of moles = Mass of water / Molar mass of water

Number of moles = 15.94 g / 18.015 g/mol

Number of moles = 0.8856 mol H₂O.

Therefore, there are 0.8856 moles of water in 15.94g of H₂O.

Answer 2

Your answer would be 0,8856 mol H2O.

Molar mass of H2O is approximately 18 g/mol

15.94/18 = 0,8856 mol H2O