If a gallon of H2.O weighs 10.lbs could you please tell me what the respective element weights and quantities are to make up one gallon
2007-01-23 09:37:25 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Density of water = 1 kg/L
1 lb = 454 g
1 gal = 4.55 L
Therefore 10lbs does roughly equal 1 gallon
Anyway, there are 2 atoms of hydrogen to every one atom of oxygen
O = 16 g/mol
H = 2 x 1 g/mol
Water weighs 18 g/mol
Therefore H accounts for 1/8 the mass
ie 1.25 lbs
and oxygen the remainder
ie 8.75 lbs
Out of interest, why are you doing it in gallons and lbs anyway - usual scientific units (ie SI) are L (or dm^3) and kg
2007-01-23 23:58:38 · answer #1 · answered by Anonymous · 0⤊ 0⤋
if a gallon of H2O weighs 10 pounds there's someting in it besides water. regardless of that, yes a water is 2 parts hydrogen and one oxygen. weightwise however it is 80% oxygen and 20% hydrogen or 8 pounds O and 2 Pounds H. please don't ask me a specific molecule count as I've run out of fingers.
2007-01-23 17:49:15 · answer #2 · answered by yeraluzer 4 · 0⤊ 0⤋
well i cant but i can guess if you mean molecular weight think that hydrogen weighs only one and oxygen weighs 8
2007-01-23 17:42:36 · answer #3 · answered by Killercobra 3 · 0⤊ 0⤋