Chemical Forums
Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: quickie1 on September 03, 2014, 02:19:10 PM
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I don't know how to approach this problem.
You take three compounds, each consisting of two elements (X, Y, and/or Z), and decompose them to their respective elements. To determine the relative masses of X, Y, and Z, you collect and weigh the elements, obtaining the following data:
Elements in Compound...Masses of Elements
X and Y.. X=0.4g Y=4.2g
Y and Z...Y=1.4g Z=1.0g
X and Y....X=2.0g Y=7.0g
a. What are the assumptions needed to solve this problem?
b. What are the relative masses of X, Y, and Z?
c. What are the chemical formulas of the three compounds?
d. If you decompose 21 g of compound XY, how much of each element is present?
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Do you know law of multiple proportions? See if it works for the data in table.
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The 3rd data that you given....
Please recheck it...
I think there should be X and z