3 years ago

what is the percent composition of compound that has a total mass of 63.9 g that contains 51.0 g Cu and 12.9 g O?

Chemistry

1 answer:

kupik [55]3 years ago

8 0

79.1% Cu
20.2% O

You divide each mass of the element by the total mass and times it by 100 to make it percent.

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Mass of isotope 1 = 113 amu

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Formula used for average atomic mass of an element :

$\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})$

$A=\sum[(113\times 0.05)+(115\times 0.95)]$

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