lukasmana72
Answered

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A sample of unknown element X contains the following isotopes: 80% of C -64, 15% of X - 65, and 5% of X-66. What is the average atomic mass of element X? Can somebody help me with this question. Will mark brainliest.

A Sample Of Unknown Element X Contains The Following Isotopes 80 Of C 64 15 Of X 65 And 5 Of X66 What Is The Average Atomic Mass Of Element X Can Somebody Help class=

Sagot :

arslanamir186

Answer:

64.25

Explanation:

Average atomic mass = percentage × mass of all isotopes/ 100

Relative atomic mass = 80*64+15*65+5*66/100

=5120+975+330/100

=6425/100

64.25

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