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jekas [21]
3 years ago
7

Gallium has two naturally occurring isotopes, 696a (isotopic mass 68.9256 amu, abundance 60.11%) and 716a (isotopic mass 70.9247

amu, abundance 39.89%). Calculate the atomic mass of gallium
Chemistry
1 answer:
avanturin [10]3 years ago
4 0

Answer:

Atomic mass of Gallium is 69.7230 amu

Explanation:

100 atoms of gallium contains 60.11 number of ^{69}\textrm{Ga} atoms and 39.89 number of  ^{71}\textrm{Ga}   atoms.

Therefore  atomic mass of gallium is given by-

\frac{(60.11\times atomic mass of ^{69}\textrm{Ga})+(39.89\times atomic mass of ^{71}\textrm{Ga})}{100}

= \frac{(60.11\times 68.9256 amu)+(39.89\times 70.9247 amu)}{100}

= 69.7230 amu

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