Use the following set up to answer the next 3 questions. In the figure, a block of mass M hangs at rest. The rope that is fastened to the wall is horizontal and has a tension of 55 N. The rope that is fastened to the ceiling has a tension of 106 N and makes an angle θ with the ceiling. Use g = 9.80 m/s2

You are asked to recrystallize Succinic acid with one of three solvents (Ligroin, ethanol and acetone).  The solubility data for each is shown in the table below.  Which one is the best solvent to obtain the highest yield for the recrystallization? Solvents Ice Bath Room Temperature Boiling Point Ligroin Insoluble Insoluble Insoluble Ethanol Soluble Soluble Soluble Acetone Insoluble Slightly Soluble Soluble

You are conducting the acetophenetidin reaction and just finished your hot gravity filtration.  You notice that you have some activated carbon in your filtrate solution.  What is the best way to address this problem?

Sue has finally collected a pure aromatic diol product after 4 days of reactions and workup. She was so excited that she accidentally put the pure product into a dirty vial that had solid NaCl inside.  Which method would be the fastest way to purify the product?

When the PictureBox control’s SizeMode property is set to AutoSize, the PictureBox control is automatically resized to fit the image that will be displayed.

In code, if you want to clear the text that is displayed in a Label control, simply assign an empty string (“”) to the control’s Text property.

Which one of the following statements declares a string variable named message?

What value will be printed to the screen with the following code?   def get_letter_grade(grade):     if 90

Rhea visited a crowded and noisy coffee shop with her friend. However, she was able to focus only on what her friend was saying to her without being distracted by other sounds. This can be explained by:

After watching a scary television movie, Julie perceived the noise of the wind rattling her front windows as the sound of a burglar breaking into her house. Her mistaken interpretation best illustrates the influence of