November 28, 2021, 06:25:53 AM
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### Topic: Composition Determination of a Mixture  (Read 621 times)

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#### John11

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##### Composition Determination of a Mixture
« on: June 22, 2021, 02:50:35 AM »
You are given a sample that contains a mixture of the following two arsenic-containing minerals: paakkonenite (Sb2AsS2) and orpiment (As2S3). You start with a sample of this mixture that has a mass of 98.49 grams. You perform a reaction that converts the arsenic (As) in these minerals into the form calcium arsenate (Ca3(AsO4)2), and 62.46 grams of this product are obtained.
What is the percent by mass of paakkonenite in the original sample?

I don't understand the steps that need to be taken in order to solve this problem. Any help or clarity is appreciated.

#### Borek

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##### Re: Composition Determination of a Mixture
« Reply #1 on: June 22, 2021, 12:48:15 PM »

Hint: you have two unknowns: mass of paakkonenite and orpiment. Information given allows you to write two equations.
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#### Orcio_Dojek

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##### Re: Composition Determination of a Mixture
« Reply #2 on: June 25, 2021, 03:58:23 PM »
@John11