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Natalija [7]
3 years ago
15

Select from the drop-down menu to correctly complete the statement.

Chemistry
1 answer:
Alenkasestr [34]3 years ago
7 0

Answer:

C. have specific jobs

Explanation:

If an organism has specialized cells, then the cells performs specific jobs.

A group of cells that performs a specific job is called tissues.

  • In higher organisms, cells are specialized for specific purposes in them.
  • This is to ensure that cells are optimized to carry out certain functions.
  • Specialization of cells usually occurs by cellular differentiation when an organism begins to form.
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A hypothetical element consists of two isotopes of masses 86.95amu and 88.95amu with abundances of 35.5% and 64.5% respectively.
Art [367]

Answer: The average atomic mass of the element = 88.242amu

Explanation:

The abundance of the first isotope is =35.5%

 Atomic mass of first isotope = 68.9257

The average atomic mass of the first isotope =86.95amu X 35.5%  =86.95amu X 0.355 =30.8725 amu

The abundance of the second isotope =64.5%

Atomic mass of the second isotope =88.95amu

The average atomic mass of second isotope =88.95amu x 64.5% = 88.95amu x 0.645= 57.37275 amu

Now the average atomic mass =30.8725 +57.37275 = 88.242amu

OR using the formulae

Average atomic mass = [mass of isotope× its abundance] + [mass of isotope× its abundance] +...[ ] / 100

{(86.95amu X 35.5 )+(88.95amu x 64.5)}/100

8,824/100

=88.24amu

5 0
3 years ago
How do you make these equations balanced?
Sedaia [141]

Explanation:

both iron and sulphur in FeS2 undergo a change in oxidation state.

O2° -->2O degree2- Total decrease = 2×2=4

So, 4FeS2+11O2 --> 2Fe2O3+8 SO2

Hence, balanced

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Neutrons are found in the nucleus and separate the other particles so that the strong force can hold the nucleus together. Which
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As you exercise you sweat to cool yourself down meaning your body looses salt and water in the process of sweating
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