2006-11-25 11:54:08 · 4 answers · asked by cowboy_hunter2009 1 in Science & Mathematics ➔ Chemistry
First you need an element. Then you need its atomic mass rounded off to the nearest whole number.
When you see it written in an equation it can be read as moles or grams. When you go to use the information, you figure the mass in grams of the number of moles present in the equation.
Say you have H2O. H weighs 1 and there are 2 of the H's.Oxygen weighs 16. The molar mass of 1 mole of water is 18 g
2006-11-25 12:06:54 · answer #1 · answered by science teacher 7 · 0⤊ 0⤋
Start with the number of moles that you are given. Multiply by the number of grams per mole. For example: How many grams of sodium chloride are there in 3.0 moles?
3.0 mol NaCl x 58.5g NaCl/1mol NaCl = The moles NaCl cancel, leaving only the grams NaCl.
2006-11-25 11:59:26 · answer #2 · answered by steve_geo1 7 · 0⤊ 0⤋
That is based upon the element you are converting. If something is 100g/mol and you have 5 mols of it then you would multiply the two together thereby cancelling out the mols and giving you grams.
2006-11-25 11:56:38 · answer #3 · answered by mojo2093@sbcglobal.net 5 · 0⤊ 0⤋
You'll need to find the molecular weight (g / mol) of the compound.
So, you multiply the number of moles by the molecular weight.
mol x (g/mol) = g
2006-11-25 11:56:57 · answer #4 · answered by nazzyonenine 3 · 0⤊ 0⤋