How much mass would one molecule of water have?

Answer 1

The mass of any molecule is equal to the sum of the Atomic Mass Units of all of its constituent atoms. Atomic Mass Unit values may be found on any Periodic Table. In this case, a water molecule consists of two Hydrogen atoms and one Oxygen atom. Hydrogen has a mass of approximately 1 AMU. Oxygen has a mass of approximately 16 AMU. Therefore, the mass of one molecule of water is approximately 18 AMU (or 18.01528 AMU exactly). What does this number mean? If you had exactly 6.022 x 10^23 molecules of water, it would weigh 18 grams.

Answer 2

You calculate it by using Avogadro's number: 6.022 x10 23 which is one mole of substance.

1.00 x 1024 divided by 6.022 x 1023 = 10 divided by 6.022 = 1.661 mol H2O

Use the molar mass of water (18.02 g mol-1) to get to the mass in grams.

18.02 g x 1.661 mol = 29.93 g H2O

Answer 3

1 molecule of water is the smallest thing water can be physically broken down to without changing its chemical formula... It consists of one oxygen and two hydrogen molecules. It weighs 18/(6.02 * 10^22) g

Answer 4

Since 6.02 x 1023 molecules is a mole, 1.00 x 1024 would be 1.66 moles.

Water has the mass of: (1.00794 g/mol x 2) + 15.994 g/mol = 18.009 g/mol

1.66 mol x 18.009 g/mol = 29.92 g

Answer 5

The molecule would normally have an atomic weight of 17, unless there were isotopes in the molecule.

Answer 6

A water molecule is made of two hydrogen atoms attached to an oxygen atom. Their atomic masses are 1 and 16 respectively. So the molecular mass of water is 2x1+16=18 grams per mole.

Answer 7

One molecule of water has a mass of about 18 atomic mass units (amu), consisting of two hydrogen atoms and one oxygen atom. This translates to approximately 2.99 x 10^-26 kilograms.

Answer 8

18 atomic mass unit or 18 gms