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3 years ago

Calculate the percent composition by mass of oxygen in HClO

Chemistry

1 answer:

r-ruslan [8.4K]3 years ago

4 0

Answer:

percentage composition of O in HClO IS 30.47

Explanation:

percentage composition of oxygen in HClO =(atomic mass of O)/(atomic mass of HClO)×100

= $\frac{16}{1+35.5+16}\times 100$

=30.47

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Answer:

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Explanation:

This a proper way to balance the equation:

- Count the OH from the base (2)

- Count the H from the acid (3)

We can make 2 molecules of H₂O but we still have one more H

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So, to form the salt, you must have 3 Ca²⁺ to react with 2 (PO₄³⁻) to make global charge of +6/-6

Therefore, if you have 3 Ca in the salt, you may have 3 Ca in the base.

So, if you have 2 phosphate in the salt, you must have 2 PO₄³⁻ in the acid.

Now you have 6 protons in the acid (6H) and 6 (OH) in the base; in conclussion you can make 6 H₂O.

Finally the ballance equation is:

3 Ca(OH)₂ + 2 H₃PO₄ → Ca₃(PO₄)₂ + 6H₂O

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4 years ago

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Answer:

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Explanation:

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An atom has the following isotopes in the the following abundances. 20 10Z 30% , 19 10Z10% , 18 10Z 60% What is the average atom

Vera_Pavlovna [14]

The average atomic mass of the atom that has the following isotopes in the following abundances: 20 10Z 30% , 19 10Z10% , 18 10Z 60% is 18.7.

<h3>How to calculate average atomic mass?</h3>

The average atomic mass of an isotopic element is the weighted average of the atomic masses of the naturally occurring isotopes of an element.

According to this question, the atom has the following isotopes in the following abundances: 20 10Z [30%] = 30/100 × 20 = 6

19 10Z [10%] = 10/100 × 19 = 1.9

18 10Z [60%] = 60/100 × 18 = 10.8

The sum of these masses is the average atomic mass and is calculated as follows:

6 + 1.9 + 10.8 = 18.7

Therefore, the average atomic mass of the atom that has the following isotopes in the following abundances: 20 10Z 30% , 19 10Z10% , 18 10Z 60% is 18.7.

Learn more about average atomic mass at: brainly.com/question/13753702

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