How many molecules in 1kg of water?

Answer 1

Hi, You need to work out how many moles of water you have in 1L of water. Then you need to know that the Avrogadro constant is the number of molecules on a mole of anything. so; water = H2O Atomic weights: Hydrogen = 1 Oxygen = 16 Mole weight of water therfore; 18 grams 1L water = 1000 grams avrogadros constant is 6.0221415 x 10^23 :. 1000 /18 = 55.5555' moles water 55.5555' x Avrogadros const = 33456308210325000000000000 = 3.3456 x10 ^25 molecules of water. Please check my figures - I don't have a scientific calculator handy. Hope this helps, Mike.

Answer 2

1 liter of water has mass about 1000 grams/liter.

Molecular mass of water=18

so No. of moles in 1liter = 1000/18= 55.55 moles

this multiplied by Avogadro's number: 6.022*1023

will give number of water molecules in 1 liter as:

55.55*6.022*1023 ~= 334.52*1023

Answer 3

1. 6.023 x 100000000000000000000000

^^^

that's Avogadro's constant Written better as 6.022 X 1023

But that's not how many molecules of water there are in 1 mole of water, That would be the total amount of atoms there are in a mole though.

H2O

There are 2 Hydrogen atoms for every Oxygen atom.

Take that number above and divide it by 3

So there for there are 2.007 X 1023 Molecules of water in 1 mole of water.

Answer 4

See the Related Questions for a similar calculation and change the math accordingly.

Answer 5

[998.2 gram / 18.0 g/mole] x 6.022 x 1023 = 334 molecules/Litre at 20oC

Answer 6

1 L = 1 kg = 1000 g = 1000/18.0(g/mol) = 55.6 mol = 55.6(mol)*[6.0*10+23(molecules/mol)] =

= 33.3*10+24 molecules per litre water

Answer 7

(103 grams H2O)(1 mole/18 grams)(6.022X1023 molecules/mole) = 3.3346x1025molecules

Answer 8

In 1 mole of water there are 6.02x10^23 molecules (Avogadro's number)

Answer 9

how many water molecules there are in 1 kg of water

Answer 10

The mass of 49 mL of water is 49 g.