free brain for whoever gives me a brain on another question you have to make a question add me so I can see ur message to confirm u made the question then give the brain then I will give the brain also free 50 points for whoever does it first

Okay I will!

Just answer a random one of my questions that already has ONE answer!

Explanation:

c) should be the answer.

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