1) A melting Point of unknown is 120-121°C, how could you tell whether it is urea
Cinnamic acid as they both have same
melting point?

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

Compare and contrast physical changes with chemical changes.

According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.