Answer:
Valency of the two elements
Explanation:
In order to correctly formularize the compound, the student needs to ask of the valences of the elements involved.
Chlorine has valency of -1, while Barium +2.
The exchange of valency gives the formula 
.
Another explanation is that Barium donates 2 electrons which the chlorine atoms accept, in order to form the covalent bond.
I hope this was helpful.
Answer:
B. Below the equilibrium price
Explanation:Price ceiling is the legal price,impose by The Government or Regulatory agencies above which a product should not be sold. It is also a price control mechanism through which the Government and other Regulatory agencies check the excesses of producers and the middle men(Whole sellers and retailers). The price ceiling has to be fixed below the equilibrium price for it to be binding, because businesses are interested mainly for profit maximization.
Explanation:
Br2 + S2O32- + 5H2O –> 2Br- + 2SO4 + 10H+ + 6e
The answer is letter B, because according to the Second Law of Thermodynamics heat can only move from a hotter body to one of colder temperature. So that's your answer: as the molecules in the pie move faster (are hotter) than the ones in the skin, heat is transfered from the pie to the skin.
