Question

5. The element copper has naturally occurring isotopes with mass numbers of 63

Answer 1

Answer:

63.616

Explanation:

DATA

1. first atomic mass;m1=63

1. second atomic mass;m2=65
2. first percentage;p1= 69.2%
3. second percentage me;p2=30.8%
4. average mass;avg= ?

SOLUTION

avg= (m1)(p1) + (m2)(p2)

100

avg= (63)(69.2) + (65)(30.8)

100

avg= 4359.6 + 2002

100

avg= 6361.6

100

avg= 63.616

Answer 2

Answer:

63.616

Explanation:

you calcute to get the results