A buffer solution is prepared by adding NH4Cl to a solution of NH3 (ammonia). what happens if NaOH is added? NH3(aq)+ H2O(l) = NH4+(aq) +OH- (aq)​

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

tracks, burrows, eggshells, nests, tooth marks, or gastroliths

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