Chlorine has two isotopes, 35cl and 37cl; 75.77% of chlorine is 35cl, and 24.23% is 37cl. the atomic mass of 35cl is 34.969 amu, and the atomic mass of 37cl is 36.966 amu. what is the atomic weight of chlorine?

The average atomic mass of chlorine is 35.45 amu

Explanation:

Mass of isotope - 35 = 34.969 amu

% abundance of isotope-35 = 75.77% =

Mass of isotope - 37 = 36.966 amu.

% abundance of isotope-37  = 24.23% =

Formula used for average atomic mass of an element :

Therefore, the average atomic mass of chlorine is 35.45 amu

h let me think

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.