moles and molar mass

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Question description

Chapter 3: Concept Explorations

d. What is the mass of chloride ions present in 1.0 mol XCl2 and 1.0 mol YCl2 ?

  1. What are the molar masses of elements X and Y?

  2. How many moles of X ions and chloride ions would be present in a 200.0-g sample of XCl2 ?

  3. How many grams of Y ions would be present in a 250.0-g sample of YCl2 ?

  4. What would be the molar mass of the compound YBr3 ?

Part 3: A minute sample of AlCl3 is analyzed for chlorine. The analysis reveals that there are 12 chloride ions present in the sample. How many aluminum ions must be present in the sample?

  1. What is the total mass of AlCl3 in this sample?

  2. How many moles of AlCl3 are in this sample?

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