Mark M. answered • 10/19/19

Mathematics Teacher - NCLB Highly Qualified

x represents the amount of 28

150 - x represents the amount of 30

28x + 30(150 - x) = 4272

Can you solve for x and answer?

Juluissa E.

asked • 10/19/19A sample of silicon contains two isotopes: silicon-28 and silicon-30. Silicon-28 atoms have a mass of 28 amu,

whereas silicon-30 atoms have a mass of 30 amu. The sample contains 150 atoms and has a total mass of 4272 amu.

Determine how many atoms of each isotope are contained in the sample.

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Mark M. answered • 10/19/19

Mathematics Teacher - NCLB Highly Qualified

x represents the amount of 28

150 - x represents the amount of 30

28x + 30(150 - x) = 4272

Can you solve for x and answer?

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