Chem I - Sludge Review for Final Exam

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

Tags

NGSS.MS-PS1-2

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

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

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

Tags

NGSS.MS-PS1-2