Calculate the number of moles of 1) iron atoms in 9.6g of iron oxide, Fe2O3

2) chlorine ions in 79.17g magnesium chloride

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8