how much grams of water do we need to have 1 gram hydrogen?

Answer 1

Well. That's answer's wrong.

Water is H2O. Normalizing the weight, we can say each hydrogen weighs 1. Then each oxygen weighs 16. Bringing water's total weight to 18 (two hydrogen, one oxygen).

Now you say you want 1 gram of hydrogen, but it's 2:18 (or 1:9)for hydrogen to water, so you'd need 9 grams of water to get 1 gram of Hydrogen.

If you wanted 1 MOLE of hydrogen (going by pure numbers of atoms), then it's 2:1 for hydrogen to water, so if you wanted let's say a hundred hydrogen atoms, you'd only need 50 water molecules to get there.

I have no idea where that guy's 1.5 came from though.

Answer 2

Molecular Weight of H2O
Hydrogen=2
Oxygen=16
MW Water=18
Therefore 2 grams of Hydrogen and 16 grams of Oxygen yield 18 grams of water. Dividing everything by 2.
1 gram of Hydrogen and 8 grams of Oxygen yields 9 grams of Water

Answer 3

if we say that Oxygen = 16 g/mole ,,and hydrogen = 1g/mole then Water H2O = 2+16 =18 g/mole
so 18 grams of water gives 2 grams of hydrogen
then 9 grams of water will give 1 gram of hydrogen

Answer 4

well, water is made of 2 hydrogen atoms and one oxygen atom. one gram of hydrogen is 602,252,000,000,000,000,000,000 amu's, which is basically a one to one ratio, 1 amu= 1 hydrogen atom. If we wanted 602,252,000,000,000,000,000,000 water molecules, we would need 18 grams of water. So for every 18 grams of water, you'd have 2 grams of Hydrogen ( 2 hydrogens in one molecule of water) So, the answer is 9 I suppose.

Answer 5

9

Answer 6

you need 1 gram Hydrogen is equal to one mole hydrogen and and to have 1 mole hydrogen you have to have 0.5 mole water which is 9 grams of water.

Answer 7

first you're taking the finished mass 91g Molar mass of water = 18g/mol (91g/18g/mol) = 5.056 moles of H2O Moles H2O * Avogadro's # = molecules H20 (5.056 mol)(6.03x10^23 molecules/mol) = 3.049x10^24 Molecules H20 # of H atoms = 2*(Molecules H2O) = 2*3.049x10^24 = 6.098x10^24 Hydrogen Atoms

Answer 8

1 mole of water = 2 mole of hydrogen.

1 mole of water weight 18 g.
2 moles of hydrogen weight 2g.

so it takes 9g of water to obtain 1g of hydrogen.

another way to obtain this answer :

H20 weight 18g/mol
1g H20 = 0.055 mol
0.055 mol H20 = 0.11 mol H

0.11 mol H2 * 1.00794 g/mol (H) = 0.11g of H for each g H2O

So it takes 9.09 g of water to give 1g of hydrogen.

Answer 9

9 gms of water - 8gms O2 and 1 gm H2

Answer 10

1.5 grams