4.the two most abundant isotopes of carbon are carbon-12 (mass 12 amu) and carbon 13( 13amu). their relative abundances are 98.9% and 1.10%. what is the atomic mass of carbon?
5.element X has two isotopes: X-100 and X-104. if the atomic mass of X is 101 amu, what is the relative abundance of each isotope in nature?
thanks in advance
2007-08-31 19:14:53 · 3 answers · asked by Tammy 2 in Science & Mathematics ➔ Chemistry
.989*12+.011*13 = 12.011
x*100 + (1-x)104 = 101
-4x+104=101
4x=3
x=.75 or 75% for isotope 100 and 25% for isotope 104
2007-08-31 19:33:45 · answer #1 · answered by chasrmck 6 · 1⤊ 0⤋
4) .989*12 + .011*13 = 12.011
2007-09-01 02:28:43 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 0⤋
Good Morning. You know the answer just do not doubt. As for me the chemistry seems to be positive.
2007-09-01 02:24:20 · answer #3 · answered by Grin again 2 · 0⤊ 1⤋