Question

Can someone explain the concept of converting grams to moles?

Answer 1

Convert g to mol

Answer 2

_____________________ is the given compound or molecule

Answer 3

\[Moles = \frac{Grams}{Molecular Mass}\]

Molecular Mass is the sum of molecular mass of atoms in a molecule. So,
For instance,

NaCl

Na has a molecular mass of 23g/mol
Cl has a molecular mass of 35g/mol

NaCl = 23g/mol + 35g/mol = 58g/mol

Thus, we have a molecular mass of 58g/mol, now if we have a mass in grams of pure sodium chloride we can sub that into our equation above with the molecular mass to determine its moles

Answer 4

Moles are just a way to relate particle amount with mass of a substance

Answer 5

For instance,

1g of Carbon 14 (note it has a molecular mass of 14g/mol because it has 6 protons and 7 neutrons)
and
1g of Sodium 22 (It has 11 protons and 11 neutrons so 22g/mol)

1g of Carbon 14 will be a larger amount in moles than 1g of sodium 22

This is because carbon weighs less than sodium, so you can fit more carbon atoms into 1g than you can sodium.

Hope this makes sense.

Answer 6

Ok so what if I'm trying to figure out how many grams of Oxygen in 4.00 moles?