gram to mol
Started by joonkimdds
Dimensional analysis is your friend.
100g H2 x (1mol/2g)
Cancel the units so you get (100 x 1mol)/2=50 mol H2
It's easier to see how to cancel if you write it on paper. If you were to write (2g/mol) units wouldn't cancel and you would get units of grams squared per mol. Doesn't make much sense...Let me know if that helps.
100g H2 x (1mol/2g)
Cancel the units so you get (100 x 1mol)/2=50 mol H2
It's easier to see how to cancel if you write it on paper. If you were to write (2g/mol) units wouldn't cancel and you would get units of grams squared per mol. Doesn't make much sense...Let me know if that helps.
how about
32g of O2 = ? mol
32g of 1/2O2 = ? mol
14g of Al = ? mol
14g of 2Al = ? mol
32g of O2 = ? mol
32g of 1/2O2 = ? mol
14g of Al = ? mol
14g of 2Al = ? mol
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These two equal each other.
Same thing with Aluminum.
If you have two piles EACH of a kilogram, is it the same as a pile that is 2 kilos?
really? because diff people r telling me diff answers.
Some people said
32g of O2 = 1mol
but
32g of 1/2O2 = 2 mol because it's like saying one O that is 16g/mol.
They're wrong.
Think about it. You have 32 grams of it. That is a set number of grams and hence a set number of molecules and (finally) a set number of moles.
You can't have single atoms of Oxygen floating around anyway.
So far, 2 people said 32g of 1/2 O2 would have 2 mol
you said 1 mol
and one guy from yahoo said 0.5 mol 😱
"32 g of 1/2 O2 would be half of the moles you found of 32g O2"
Anyway 3 people so far are saying that they can't be the same.
Basically you are saying that the coefficient doesn't count even though the number in the back counts, right?
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100g of 1/2O2 doesnt make any sense to me. are you trying to find moles so you can use it to find the quantity of another molecule (like in a combustion reaction or something)? you would use the coefficients in front of the molecule as a proportion, not to determine the actual mole quantity.
does the 100g of 1/2O2 make sense to everyone but me?
does the 100g of 1/2O2 make sense to everyone but me?
come to think of it....it doesn't make sense 🙂
and I don't know where I got these questions from.
I wrote them down from last yr and i had them unanswered at that time and I asked here but I guess the questions are wrong?
and I don't know where I got these questions from.
I wrote them down from last yr and i had them unanswered at that time and I asked here but I guess the questions are wrong?
There is no such element or compund as half O2. 32g contradicts 1/2 O2, because 1/2 O2 is only 16 grams. The question is wrong.
