The atomic weight of carbon (C) is 12.01 amu. How many carbon atoms are contained in 42.6 g of carbon?
2007-09-15 12:28:40 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
mass divided by atomic weight will give you the number of moles of carbon. The moles times the Avogadro # will give you the number of carbon atoms. So 42.6/12.01 = 3.55 moles of carbon times 6.022 X 10^23 = 2.14 x 10^24 carbon atoms
2007-09-15 12:41:16 · answer #1 · answered by Mrs. F 2 · 0⤊ 0⤋
There are 6.02 x 10E23 (Avogadro's #) atoms in each mole of a substance. A mole of carbon will have 12.01 grams. Divide your starting 42.6g by 12.01 to get moles and then multiply by Avogadro.
2007-09-15 19:39:35 · answer #2 · answered by reb1240 7 · 0⤊ 0⤋
mol=mass/molar mass
and solve for the moles then moles= # of particles/A.V#
A.V # =6.02 E23
2007-09-15 20:02:12 · answer #3 · answered by jas 1 · 0⤊ 1⤋