3 years ago

An unknown element X has the following isotopes: 126X (22.00%

Chemistry

1 answer:

enot [183]3 years ago

6 0

Answer:

$m_X=128.44 a.m.u$

Explanation:

Hello there!

In this case, since the average atomic mass of an element, when given the atomic mass and the percent abundance of the naturally occurring isotopes is computed as shown below for this unknown element:

$m_X=126*0.22+128*0.34+130*0.44$

Whereas the atomic mass of each isotope is multiplied by the percent abundancy; we obtain:

$m_X=128.44 a.m.u$

Best regards!

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2 years ago

A 45 gram piece of metal has a volume of 18cm3. What is the density of this metal?

ruslelena [56]

Answer:

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