2NH3 is equivalent to N2 + H6 since the 2 at the beginning gets distributed to both atoms. Knowing this you can rewite the equation as
H2 + N2 = H6 + N2
The N2 can cancel out leaving
H2 = H6
You now have to ask ‘2 times what equals 6?’ The answer is obviously 3 at this point.
Answer: C. 3
D.exotic animal trade contributes to reemergence of diseases more than the appearance of new disease<span />
Psychology is a science because it follows the empirical method. ... We can directly observe and carefully measure externals such as what a person does, says, and marks down on a psychological test. We cannot directly observe a person's mind (e.g., internal thoughts, emotions).
Answer:
Les ruminants sont dotés d'un estomac puissant qui se compose de 4 poches : la panse, le bonnet, le feuillet et la caillette. Chacune joue un rôle bien précis dans la rumination
