How many state of matter do we have

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 is the formula of the ionic compound composed of calcium cations and chloride anions

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?