Why are the number of protons and neutrons equal in a neutral atom?

How many grams of aluminum will there be in 98g of al2o3?

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

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