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Webb has calculated the percent composition of a compound. How can he check his result? by making sure they are in the lowest ratio by adding them to see if they total 100 by checking that they are whole-number multiples by dividing them by the molar mass

Jeffrey Rodriguez

in Chemistry

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William Cain on May 10, 2018

Answer: the second option, by adding them to see if they can a total of 100.Explanation:percent composition of a compound indicates the quantity of each item taken 100 as the basis of the total amount, which adds up to 100.You can check it mathematically in this way.Let's suppose that you have a quantity n of a compound formed by many elements, and the quantities of each item are n₁, n₂, n₃ ,....., is n₁ + n₂ + n₃ + ... = n.When calculating the percentage of each element:%n₁ = n₁ / n × 100%n₂ = n₂ / n × 100%n₃ = n₃ / n × 100 .... and so on.Now, when the sum of all the percentages you get:n₁ / n × 100 + n₂ / n × 100 + n₃ / n × 100 + ... = [n₁ + n₂ + n₃ + ... ] / n × 100 = = n/n × 100 = 1 x 100 = 100.Therefore, the sum is 100, and this is a way to check your result.


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