<span>Actually, the heat of reaction hrxn s calculated by taking
the sum of the heats of formation of the products minus the sum of the heats of
formation of the reactants. However, at heat of formations of pure elements at
atmospheric conditions is zero, therefore the hf of N2 is not important since
it is zero anyway.</span>
The correct answer would be, "<span>D. beta-galactosidase".
As all the others are made in different organisms.
Hoped I helped.</span>
Difference in density between the two liquids
When electrons are added to the outermost shell of a carbon atom, it forms an anion.
Answer:
symbol= F
proton= 9
neutron= 19 I understand this is it ok for you
