A warm crucible when placed on an electronic balance will have a mass, more, les

Question

A warm crucible when placed on an electronic balance will have a mass, more, less or no different than when compared to the same crucible at room temperature? What two lines from the table are subtracted to calculate the mass of hydrate salt (3): What two lines from the table above are subtracted to calculate the mass of the anhydrous salt (5): what two lines for the table above are subtracted to calculate the mass of water lost (6): What two lines are needed to calculate the percent water by mass (7): Calculate the missing data, letters A-D, in the table above. Use appropriate significant figures and units.

Explanation / Answer

3) Answer : Less

4) Answer : Line 2 - Line 1

5) Answer : Line 4 - Line 1

6) Answer : Line 3 - Line 5

7) Answer : Line 6 and Line 3 [(Line 6/Line 3)*100]%

8) Answer :

8.A) Answer A = Line 2 - Line 1 = 15.050 - 12.237 = 2.813 gm

8.B) Answer B = Line 4 - Line 1 = 14.006 - 12.237 = 1.769 gm

8.C) Answer C = Line 3 - Line 5 = 2.813 - 1.769 = 1.044 gm

8.D) Answer D = [( Line 6/ Line 3)*100] = [(1.044/2.813)*100]=37.11%

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