Which of the following is the balanced equation for this process?

a. 2nh4no3? 2n2 + o2 + 4h2o
b. nh4no3? n2 + 3o2 + h2o
c. 2nh4no3? n2 + o2 + 3h2o
d. 2nh4no3? n2 + 3o2 + 2h2o

just did the assignment and the answer was #1 +2 n

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