if converting from grams to moles 5 grams of ( 4 C3 H5 N3 O9) (4 being the co-efficent) what are the moles. I forgot how to do simple stuff when you multiply 5(1 mol / molecular mass) do you multiply it by 4? in other words do you do 5(1 mol/ 227.1) or 5(1 mol/908.4) , because of the coefficent. Please i need an answer asap. this is a small step in a half hour problem that goes a long way. Seem to have forgotten my basics.
2007-11-14 16:58:17 · 4 answers · asked by Protons 2 in Science & Mathematics ➔ Chemistry
it is in a balanced equation
2007-11-14 17:07:05 · update #1
No, you do not multiply by the coefficient. Just divide the grams given by the Molar Mass of the substance.
2007-11-14 17:02:35 · answer #1 · answered by papastolte 6 · 0⤊ 0⤋
Grams of Atom = Moles of Atom
Use the molar mass(g/mol) as the conversion factor
2007-11-14 17:13:31 · answer #2 · answered by Tonie M 1 · 0⤊ 0⤋
4C3H5N3O9 Mol.mass = (3x12) + (5) + (3x14) + (9x16)
= 227 x 4 = 908g/mole.
Mass/mole.mass = 5g/908g/mole.
= 0.006 moles
(Moles means Molecules. The coefficient of 4 means 4 molecules of the substance I believe. So, the whole Mol.formula includes the coefficient)
2007-11-14 17:19:03 · answer #3 · answered by Norrie 7 · 0⤊ 0⤋
If i understand your question right, you will
5 g x 1/Molar Mass Unless there's a balanced equation, you ignore the four. Good Luck!!!!
2007-11-14 17:05:44 · answer #4 · answered by Doc. Ock 3 · 0⤊ 0⤋