How does the sharing of bonding electrons in a molecule of cl2 compare to that in a molecule of hci?

What does x represent in the formula for the compound xcl4?

Calculate the number of molecules present in 0.750 mol of mgo.

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