[Moss]

Hey thanks

another stoich question
WO3 + 3H2 -> W +3H20
a) what mass of tungsten can be obtained from 200g of its oxide
b) what mass of hydrogen is required?


i've done a
need help on b

my attempt
Step 1. MOLE
is 0.862677mol of WO3

step 2 ratio
3/1 *0.862677
=2.58831

step 3 mass
2.58831*(2*1.01)
5.16g


thanks

[Borek]

I have not checked the numbers thoroughly, but it looks like you did b, not a.

[Moss]

to do b dont you need the infomation you obtained from a.


i dont know what to do next for b

please help

[Tin Man]

What you said was "Step 1" was not step 1 as you described it.

The problem I'm seeing in what you described has to do with your molar conversion. There is only one W atom on one side of the equation, and only one on the other side of the equation.

So I, at least, am confused as to why you are multiplying by 3, and then multiplying that by 2(1.01), since that would be the molar mass of HYDROGEN, not TUNGSTEN. Tungsten trioxide to elemental tungsten is a 1:1 ratio.

Is that where you're getting confused?

If it's of any consolation, it looks like you found the answer to part 2 alright.

[Moss]

Thanks alot Tin Man! i got it

[Mikiomiles23]

Helped me out a lot; thanks fellas!