49 points! will mark brainliest!
1. given the following equation: n2 (g) + 3 h2 (g) ↔ 2nh3 (g) δh = -92 kj/mol
a. is this reaction exothermic or endothermic?
b. what direction will the equilibrium shift if nitrogen gas is removed?
c. what direction will the equilibrium shift if the temperature is lowered?
d. what direction will the equilibrium shift if ammonia (nh3) is added?
e. what principle you answer b-d?

e. I will answer the last one first - the equation describes a reversible reaction and the equilibrium is determined by the Le Châtelier's principle.

a. It is exothermic.

b. It will shift towards the reactants side (N2+H2).

c. It will shift towards the product side (NH3).

d.  It will shift towards the reactants side (N2+H2).

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally