You can only combine positive ions with negative ions. Write the positive ions first and negative ions second. Circle the oxidation numbers and move the numbers across, diagonally, and they become the subscripts.
Na+1 Cl-1 NaCl
Mg+2 Cl-1 MgCl2
Al+3 Cl-1 -- AICI3

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.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

a

the right answer is c i just did the question.