Agas occupies 5.6 liters at 0.860 atm. what is the pressure if the volume becomes 3.0l?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

What’s the percent by mass of carbon in c10h14n2

Consider the reaction: n2(g) + o2(g) ? 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?