<<What is the mass in grams of 0.99x10^49 Sodium Chloride Molecules?>>
First find out how many moles that is by dividing by Avogadro's number, 6.02*10^23 molecules/mole. You get 1.64*10^25 moles. Then multiply that result by 58.5 gm/mole, the molar mass of NaCl.
You will get a very large number, comparable to the mass of the Earth. Are you sure you copied the problem correctly?
<<How many moles of Cu are in 9.61 grams?>>
Divide by the atomic mass of Cu, 63.5 g/mole
<<How many moles are in 5.94x10^45 Ne atoms?>>
Multiply that by the atomic mass of Neon, which it would be a good idea to look up, so that you get some practice doing this sort of thing.
I'm having trouble converting moles to grams and finding the mass of molecules.
Problems I'm stuck on:
What is the mass in grams of .99x10^49 Sodium Chloride Molecules?
and How many moles of Cu are in 9.61 grams?
and How many moles are in 5.94x10^45 Ne atoms?
I just really need to know how to solve these. Thanks.
3 answers
The two pertinent pieces of information are here.
mols = grams/molar mass
There are 6.02 x 10^23 anythings in a mol; therefore,
mols = # atoms/6.02 x 10^23
or
mols = # molecules/6.02 x 10^23
Let me know if this doesn't help but explain in detail what the problem is.
mols = grams/molar mass
There are 6.02 x 10^23 anythings in a mol; therefore,
mols = # atoms/6.02 x 10^23
or
mols = # molecules/6.02 x 10^23
Let me know if this doesn't help but explain in detail what the problem is.
Well, you know that twelve of anything is a dozen of them.
In exactly the same way, 6.022*10^23 of atoms or molecules is a mole of them.
In exactly the same way, 6.022*10^23 of atoms or molecules is a mole of them.
1 answer