How many molecules are in 0.45 moles of aluminum metal ?

There are 2.7× 1023atoms in 0.45 mol of Al.

Explanation:

answer

the ions in solute supperate from eachouthere

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.