How many moles of hydrogen atoms are present in 25 grams of water?

Answer 1

For this you need the atomic (molecular) mass of H2O. Take the number of moles and multiply it by the Atomic Mass. Divide by one mole for units to cancel. H2O= 18.0 grams

2.5 moles H2O × (18.0 grams) = 45.0 grams H2O

Answer 2

Go to the Periodic Table. H2O = 2x1 (hydrogen) + 1x16 (oxygen) = 18. So 1 mole of water weighs 18 grams and you have 25 grams. Divide 25 by 18 which gives you 1.39 moles.

Answer 3

For this you need the atomic (molecular) mass of H2O. Take the number of moles and multiply it by the atomic mass. Divide by one mole for units to cancel. H2O= 18.0 grams

2.5 moles H2O

Answer 4

Since Mass = Mole x Mr,

Mass = 25 x (16 + 1 + 1) = 450 grams

Answer 5

There is approximately 0.28mol in 5grams of water.

Calculations:

***18g/mol = molar mass of H2O

5g H2O (1mol/ 18g) = 0.2777.....

Answer 6

1 mole H2O = 18g

25g H2O x 1mol/18g = 1.4mol H2O

Answer 7

25.0 grams of water is equal to 1,388 moles.

Answer 8

25 kilograms of water contain 1 388,88 moles.

Answer 9

25g / 18g-per-mol = 1.4 moles.

Answer 10

25.0 g x 1 mol/18g = 1.39 moles