I need to know the molar mass, moles of each element, and atoms of each element. The element is Gold(Au). How do I find out this information? I already know the mass is 51.0617 grams.
2006-11-22 02:40:20 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Molar mass: the number of grams in one mole (6.022 X 10^23 molecules) of a substance. This is taken by adding the atomic weights of each of the atoms in a molecule.
Since gold is a pure element, its molar mass is equal to its atomic weight, 196.9666.
Since you have a given mass of 51.0617 grams, divide this by gold's molar mass to get the number of moles:
51.0617/196.9666 = 0.2592 moles
Now, since there are 6.022 X 10^23 (Avogadro's number) of molecules in a mole of any substance, multiply your number of moles by this number to get the number of atoms.
0.2592 X 6.022 X 10^23 = 1.5611 X 10^23 atoms
2006-11-22 03:07:08 · answer #1 · answered by bgdddymtty 3 · 0⤊ 0⤋
Molar mass is the atomic mass (found on the periodic table) in grams (1 mole Au = 197g)
Avagadro's number (1 mole = 6.023X10^23 atoms)
Solve.
2006-11-22 10:51:27 · answer #2 · answered by Shanna J 4 · 0⤊ 0⤋
well a gold atom has 79% protons, 118 neutrons, and 79 electrons. i dont know if that helps though
2006-11-22 10:44:26 · answer #3 · answered by Anonymous · 0⤊ 0⤋
look at the table of elements , thats the best i can do sorry
2006-11-22 10:43:19 · answer #4 · answered by Brandi 2 · 0⤊ 0⤋
You have to take help from a good text book: or, the website.
2006-11-22 10:44:47 · answer #5 · answered by swanjarvi 7 · 0⤊ 0⤋
look at the periodic table. that is the most i can do.
2006-11-22 10:53:25 · answer #6 · answered by sara 2 · 0⤊ 0⤋