CHEM!! HELP (1 Viewer)

[dumNerd]

Just started this stuff, need help with this question: Calculate the number of hydrogen atoms in 0.35mol of methane (CH4)
How do I find the mol(H4)

 

[Drdusk]

Just started this stuff, need help with this question: Calculate the number of hydrogen atoms in 0.35mol of methane (CH4)
How do I find the mol(H4)

@jazz519

 

[username_2]

Mol of hydrogen atoms = n(CH4)*4 as there are 4 hydrogens for every molecule of CH4. Therefore, n(H) = 0.35*4 = 1.4 mol

 

[andeeeeeeee]

Mol of hydrogen atoms = n(CH4)*4 as there are 4 hydrogens for every molecule of CH4. Therefore, n(H) = 0.35*4 = 1.4 mol

Assuming by "number" it actually means the number of H atoms, you'd then multiply it by avogadro's number (6.022*10^23)

 

[dumNerd]

Mol of hydrogen atoms = n(CH4)*4 as there are 4 hydrogens for every molecule of CH4. Therefore, n(H) = 0.35*4 = 1.4 mol

wait what how is four hydrogen a greater value than four hydrogen + carbon. Also isnt there 4 hydrogen for every carbon

 

[idkkdi]

wait what how is four hydrogen a greater value than four hydrogen + carbon. Also isnt there 4 hydrogen for every carbon

0.35 mol of CH4 = 0.35 mol x (CH4) = 0.35 mol x C + 0.35 mol x H4

0.35 mol x H4 = 0.35 mol x 4 x H
= 1.4 mol H

 

[Minari243]

wait what how is four hydrogen a greater value than four hydrogen + carbon. Also isnt there 4 hydrogen for every carbon

I guess just try to see moles as a count of how many particles there are in a substance. So for every particle of CH4, there are 4 particles of hydrogen. Thus, if you have 0.35 mols of CH4, you get 0.35x4, which is 1.4 mols of Hydrogen

 

[dumNerd]

0.35 mol of CH4 = 0.35 mol x (CH4) = 0.35 mol x C + 0.35 mol x H4

0.35 mol x H4 = 0.35 mol x 4 x H
= 1.4 mol H

Oh I see I thought it meant that there was 0.35 moles of the compound as a wholw

 

[dumNerd]

Oh I see I thought it meant that there was 0.35 moles of the compound as a wholw

HOLY SHIT THIS JUST MADE THE WHOLE FRICKEN CHAPTER MAKE SENSE THANKS!!!!!!!

 

[idkkdi]

HOLY SHIT THIS JUST MADE THE WHOLE FRICKEN CHAPTER MAKE SENSE THANKS!!!!!!!

? quoted your own post lol

and it does mean 0.35 moles of the compound as a whole.

 

[dumNerd]

? quoted your own post lol

and it does mean 0.35 moles of the compound as a whole.

Oops u get what I meant

 

[idkkdi]

Oops u get what I meant

The thing with moles is that you don't interpret it like how you were doing so before. Rather when you talk about moles, you assign it to a particular substance indicating that there is 6.022 x 10^23 particles of what you specify per mole. If you specify H4, then 6.022 x 10^23 of H4 which is obviously equivalent to that value x 4 for h. If you specify CH4, you have 6.022 x 10^23 of CH4 which you can further express in its components if need be.