Question

What is the mass in grams of 6.5 moles of water? What equation do I use?

Answer 1

for water, 1 mol of water molecules weigh (2+2+16)=18grams
Important mole conversion factors:
1 mole = 6.02 x 1023 particles = formula mass in grams
so 6.5 moles weigh.......??do it urself :)

Answer 2

That is WRONG @AnthonyStark

Answer 3

??

Answer 4

oh sorry...

Answer 5

hydrogen (1)....so molar mass of h2o=(1+1+16)=18

Answer 6

If you're given 6.5 moles of water, all you need to do is multiply by it's molar mass of water.
6.022 \(\times\) 10\(^{23}\) is NOT the formula mass. That is avogadro's constant. If you're unfamiliar with what that is look at your book.

Answer 7

sorry about that

Answer 8

And yes, to fina molar mass, you add up the sum of the elements. Since you have H\(_2\), that means you have 2 \(\times\) (MASS of 1 hydrogen atom). You can find the masses on the periodic table @B.Sanders

Answer 9

1 mole = 6.02 x 1023 particles = formula mass in grams
sorry...by this i meant 6.02 x 1023 particles weigh formula mass in grams

Answer 10

abb0t your a genius aren't you

Answer 11

That's what I thought @abb0t I was just making sure. Thank you! :)

Answer 12

I have NO idea what you're trying to say, @AnthonyStark but avogadro's number merely defines the number of constituent particles (atoms or molecules) in one mole of a given substance.

Answer 13

i said what u just explained...in simple words..molar mass=mass of 1 mole=mass of 6.022X10^23 particles

Answer 14

@B.Sanders

Answer 15

this lab