2fe + 3cl2 → 2fecl3 which of the following options gives the correct reactant: reactant ratio?

Since there are three chlorides on the product (right) side and only two on the reactant (left) side, you need to multiply Cl2 by 3 and multiply FeCl3 by 2 to balance the chlorines. Next, to balance the irons, you need to multiply the Fe by 2. So you get: 

2Fe(s) + 3Cl2(g) > 2FeCl3(g) 

If you use the mole-to-mole ratio between the chlorine gas and iron (III) chloride, which is (3:2) based on the coefficients, then: 

14 mol FeCl3 * (3 mol Cl2 / 2 mol FeCl3) = 21 mol Cl2 

Answer : option c) heat is released during the process.explanation :

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

Answer(d) unstable compounds that convert to acetals in the presence of alcohol and an acid; (b) semiacetals produced by alcohol subtraction from ketone;