Calculating Moles and Molar Mass
In this assignment, you will demonstrate your understanding of calculating moles and molar mass through a series of questions and data analysis. You will use the provided data and your knowledge of chemistry to answer the questions.
Group 1
Use the following data to calculate the number of moles for each compound listed. Assume you have the molar masses available for each compound.
You may use your lab sheet and notebook to complete this test.
Question 1a
Calculate the number of moles in a jar containing 142 grams of Na₂SO₄.
Question 1b
Calculate the number of moles in a jar containing 111 grams of CaCl₂.
Group 2
Analyze the data and answer the following questions based on your calculations.
Question 2a
Which sample had the highest mass and which had the highest number of moles? Are they the same? Explain your reasoning using the concepts of molar mass and moles.
Reflect on the main question: Does the sample with the highest mass always have the most atoms (moles)? Use your calculations and understanding of chemistry to support your answer.
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