Which of the following is equal to avogadro's number.

a) the number of molecules of chlorine in .50 mol cl2
b) the number of molecules of nitrogen in 1 mol n2
c) the number of atoms of bromine in 1 br2
d) the number of atoms in 1 mol co

B) the number of molecules of nitrogen in 1 mol of N2

Explanation:

Avogadro's number is equal to the amount of constituent particles in one mole of substance. It is also equal to 6.0221409e+23

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong