Be sure to answer all parts.

Calculate the standard free-energy changes for the following reactions at 25°C:

(a) H2(g) + Br2(l) → 2HBr(g)

kJ/mol

(b) 2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(l)

kJ/mol

219 grams of iron (iii) oxide reacts with excess carbon according to the reaction equation shown below. fe2o3 + c → fe + co2 after a scientist performs the chemical reaction they find the actual yield of iron to be 57.4 grams. calculate the percent yield of this chemical reaction.

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

If an atom has 12 protons and 13 neutrons