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WorksheetsChem I - Sludge Review for Final Exam
Total questions: 10
Worksheet time: 6mins
Based upon the graph provided, if an unknown solution has an absorbance of 0.4, what is the concentration?
20%
40%
60%
80%
Based upon the graph provided, if a solution has an absorbance of 0.6, what is the approximate concentration?
20%
40%
60%
80%
Based upon the graph provided, what would be the absorbance for a 25% Concentration solution?
0.25
0.45
0.65
0.85
What is the density of something that has a volume of 100 mL and a mass of 60 g?
0.6 g/L
6 g/L
0.6 g/mL
6 g/mL
An unknown substance has a mass of 27 g and a volume of 3 mL. Find the density, and use the table provided to identify the substance.
Air
Aluminum
Copper
Concrete
A distillation was done to separate two liquids. The mixture was heated carefully until the 2 liquids boiled. At what temperature did the FIRST liquid boil off?
35 C
78 C
85 C
100 C
A distillation was done to separate two liquids. The mixture was heated carefully until the 2 liquids boiled. At what temperature did the SECOND liquid boil off?
35 C
78 C
85 C
100 C
The first liquid in the distillation boiled at 78 C, what is it's identity?
Carbon dissulfide
Ethanol
Ethylene dichloride
Water
A separate distillation experiment was performed. A liquid boiled at 44 C. The student identified the substance as Carbon dissulfide. What is the percent error on this claim?
4.54%
6.23%
4.34%
8.67%
A solubility test was done. 28 g of solid dissolved into 100 mL of water at 20 C. What is the identity of the solute?
Barium nitrate
Calcium sulfate
Sodium bicarbonate
Potassium chloride
