Round each figure to three significant figures. a. 0.003210 g
d. 25.38 L
b. 3.8754 kg
e. 0.08763 cm
c. 219.034 m
f. 0.003109 mg

listen, you cant how young you were.

"you didn't chose the stud life. the stud life chose you."

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