Which of the following is correct concerning hess's law?

a-the change of enthalpy of a reaction can be found be subtracting the enthalpy of the products from the enthalpy of the reactants.

b-the change in enthalpy can be found be subtracting the enthalpy of the reactants from the enthalpy of the products.

c-the change in enthalpy can be found by adding the enthalpies of the individual thermochemical reactions of a chemical reaction.

d-the change in enthalpy can be found by subtracting the enthalpies of the individual thermochemical reactions of a chemical reaction.

Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?

What is the maximum number of electrons that an atomic orbital can contain?

The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.