Hey guys! How is the answer C? I need steps plz

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon

What energy is it when you flip on a switch on a lamp