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umka21 [38]
3 years ago
12

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

Chemistry
2 answers:
natali 33 [55]3 years ago
4 0

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=<u> (m1)(p1) + (m2)(</u><u>p2</u><u>)</u>

100

avg= <u>(63)(69.2) + (65)(30.8)</u>

100

avg= <u>4</u><u>3</u><u>5</u><u>9</u><u>.</u><u>6</u><u> </u><u>+</u><u> </u><u>2</u><u>0</u><u>0</u><u>2</u>

100

avg= <u>6361.6</u>

100

avg= 63.616

Ganezh [65]3 years ago
4 0

Answer:

63.616

Explanation:

you calcute to get the results

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If a sample of air in a closed container was heated, would the total pressure of the air in the container increase, decrease, or
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5 0
3 years ago
In the reaction between Li and O, there is a transfer of electrons making an ionic bond. In the bond, lithium would be a (n) bec
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Explanation:

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6 0
4 years ago
Calculate the frequency of electromagnetic wave with the wave length 344nm ( hint: use dimensional analysis)
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                      ---------------------------
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Hope this helps!



5 0
3 years ago
16. Mass = 10g
inessss [21]

Actual volume=Final Volume-initial volume

\\ \sf\longmapsto 50ml-30ml=20ml

Now

\\ \sf\longmapsto Density=\dfrac{Mass}{Volume}

\\ \sf\longmapsto Density=\dfrac{10}{20}

\\ \sf\longmapsto Density=2g/ml

3 0
3 years ago
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