I don't understand how to solve. 1. For the exothermic reaction below, increasing the pressure would

N2(g)+3H2(g)⇄2NH3(g)
a. increase [H2]
b. increase [NH3]
c. increase [N2]
d. have no effect

2. If K=100, then the value of K for the reverse reaction is
a. the same value
b. can only be determined by experimentation
c. the negative of the value for the forward reaction
d. 0.01

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

Explain what happens at the saturation point when adding salt to water at room temperature.

Can someone me with 3 and 4 plz. this is for masteries test.