HELP! (Probably) Stupid Chemistry Question

[dmw16]

What is the MASS ratio of hydrogen to oxygen when they react stoichiometrically to form water?

 

[Gunslinger08]

(2*1.0079)/(15.9994)

 

[CrazyLazy]

Pretty sure you just find the mass of two hydrogens, then the the mass of one oxygen. Divide them. I'm not going to give the answer to you.

 

[James3shin]

If I'm understanding your question properly, then I say 16 - 2, or 8 to 1?

 

[rudeguy]

42

 

[DrPizza]

Originally posted by: James3shin
If I'm understanding your question properly, then I say 16 - 2, or 8 to 1?

hydrogen to oxygen

Might want to rethink that for just a moment. Close though.

 

[dmw16]

Originally posted by: joshsquall
(2*1.0079)/(15.9994)

That's what I thought at first, but isn't the reaction actually O2?

 

[dmw16]

This is for my advanced propulsion class, but I am totally drawing a blank with the chemistry.

My guts says:

Reaction is

2*H2 + O2 -> H2O

so mass ratio is

2*(2*1.00079) / (2*15.9994)?

 

[CottonRabbit]

Double the amount of hydrogen used too. And that rxn would yield 2 H2O.

 

[chusteczka]

Originally posted by: dmw16
What is the MASS ratio of hydrogen to oxygen when they react stoichiometrically to form water?

He he, he said "stroke your meter stick".

 

[Gunslinger08]

You're overcomplicating it (and 2*H2 = 4*H, not 2). All that really matters is the right hand side, H2O. 2H2 + O2 makes 2H2O. 2H2O has the same mass ratio as H2O, which is roughly 1/8.

 

[dmw16]

Not sure the right hand side matters as much in this case because I am less interested in the reactants and more interested in what is flowing into the engine.

 

[Gunslinger08]

2H2 + O2 -> 2H2O
2*2*1 / 2*16 : 2*2*1 / 2*16
4/32 : 4/32
1/8 : 1/8

 

[CottonRabbit]

Since chemical reactions conserve mass, the mass ratios between the products will be the same as that between the reactants.

 

[MotF Bane]

Originally posted by: rudeguy
42

:thumbsup:

 

[James3shin]

Originally posted by: DrPizza

Originally posted by: James3shin
If I'm understanding your question properly, then I say 16 - 2, or 8 to 1?

hydrogen to oxygen

Might want to rethink that for just a moment. Close though.

 

[jagec]

Originally posted by: dmw16
Not sure the right hand side matters as much in this case because I am less interested in the reactants and more interested in what is flowing into the engine.

The reactants ARE what is flowing into the engine...

 

[Billb2]

Why ask in ATOT?

...the compound formed from hydrogen and oxygen is water, which is found to have mass proportion 8:1 oxygen to hydrogen.