Sagot :
The atomic mass would be 28.08535 amu. Multiply 27.9769 by .92297 = 25.803. Multiply 28.9765 by .046832 to get 1.357. Multiply 29.9738 by .03872 to get .925351136. Add 25.803 + 1.357 + .03872 to get 28.08535 amu
Answer:
Converting the percent abundance into decimal form, we get:
Si-28: 92.21% = 92.21/100 = 0.9221
Si-29: 4.70% = 4.70/100 = 0.0470
Si-30: 3.09% = 3.09/100 = 0.0309
Average atomic mass of silicon is:
(27.98) x (0.9221) + (28.98) x (0.0470) + (29.97) x (0.0309)
= 25.800 + 1.362 + 0.926
= 28.08 amu
Explanation:
From PLATO