The element chromium has four naturally occurring isotopes. Use the relative abundance of each to calculate the average atomic mass of chromium.
Cr = 4.34%, Cr = 83.79%, Cr = 9.50%, Cr = 2.37%.
im not sure how i would do this without being given the masses! any help?
2007-10-05 15:28:45 · 3 answers · asked by nikki 2 in Science & Mathematics ➔ Chemistry
Not only do you not have the masses, you also don't have the specifics of the 4 isotopes.
Too much is missing
2007-10-05 15:38:52 · answer #1 · answered by reb1240 7 · 0⤊ 0⤋
You're right. You can't do it without knowing the masses. The problem should have said 4.34% Cr-50 and 83.79% Cr-52 or something like that, where Cr-50 is an isotope whose atomic weight is approximately 50. The actual atomic mass of Cr-50 is 49.9460442
2007-10-05 22:39:36 · answer #2 · answered by dogwood_lock 5 · 0⤊ 0⤋
The question cannot be answered without the mass of each isotope. You can get the mass of each isotope by going to a Handbook of Chemistry and Physics.
2007-10-05 22:41:05 · answer #3 · answered by Anonymous · 0⤊ 0⤋