anonymous
  • anonymous
Silicon has three naturally occurring isotopes. Silicon-28 has a mass of 27.98 and a relative abundance of 92.23%. Silicon-29 has a mass of 28.98 and a relative abundance of 4.68%. Silicon-30 has a mass of 29.97 and a relative abundance of 3.09%. What is the weighted average atomic mass of silicon? 27.99 g/mol 28.09 g/mol 28.98 g/mol 29.00 g/mol
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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ganeshie8
  • ganeshie8
take each isotope mass and abundance
ganeshie8
  • ganeshie8
multiply : mass x abundance
anonymous
  • anonymous
Okay Then What? @ganeshie8

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ganeshie8
  • ganeshie8
then, add them all
ganeshie8
  • ganeshie8
27.98 x 92.23% + 28.98 x 4.68% + 29.97 x 3.09%
anonymous
  • anonymous
I Got 28.09
ganeshie8
  • ganeshie8
mostly correct !
anonymous
  • anonymous
Mostly? Does That Mean It's Not Quite Right?
ganeshie8
  • ganeshie8
idk il have to work it, but i trust your calculation lol
anonymous
  • anonymous
Haha Okay Can You Help With One More?
ganeshie8
  • ganeshie8
sure :) and 28.09 is correct, ive checked
anonymous
  • anonymous
In a 10-gram sample of carbon and a 10-gram sample of sulfur, how many more moles of carbon are there than sulfur? 0.052 moles 0.52 moles 2.05 moles 20.05 moles

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