Answer
438.3k+ views
Hint:
To calculate the percentage composition we need to find the mass of component and total mass of mixture, they are then divided followed by a multiplication with 100. The Molar mass of Pb is 207 gm mol.
Complete step by step answer:
The percentage composition of any constituent of the compound in a given compound is nothing but the percentage of the total mass of the given compound, that is being contributed by the constituent in question.
In simpler terms, we can say that the percentage composition of any constituent is a way to determine the total contribution of the constituent to the total weight of the compound in a percentage form.
In order to calculate the percentage composition, we must follow the following steps:
We must find the molar mass of all elements in the given compound in gram per mole.
Then, we must find the molecular mass of the entire compound.
After this, we must divide the desired constituent’s molar mass by the entire molecular mass of the compound.
Following which, we must multiply the above number with the number of molecules of the constituent present in the compound.
Finally, multiply the above number with 100 to get the percentage composition of the constituent
If we were to put these steps in the form of a formula, we would get;
% Composition of ‘x’ = $\dfrac{{n \times {M_x}}}{{{M_{comp}}}} \times 100$
Where, n = number of molecules of ‘x’ in the given compound
${M_x}$ = Molar mass of ‘x’
${M_{comp}}$=Molar mass of the compound
Hence, using the above formula for our problem, we get;
% Composition of Pb = $\dfrac{{n \times {M_{Pb}}}}{{{M_{[P{b_3}{{(P{O_4})}_3}]}}}} \times 100$
= $\dfrac{{3 \times 207}}{{811}} \times 100 = \dfrac{{621}}{{811}} \times 100 = 76.5\% $
Hence, Option B is the correct answer.
Note:
Remember that, the sum of all mass percentages should be 100% when added up. It is also known as percent by weight.
To calculate the percentage composition we need to find the mass of component and total mass of mixture, they are then divided followed by a multiplication with 100. The Molar mass of Pb is 207 gm mol.
Complete step by step answer:
The percentage composition of any constituent of the compound in a given compound is nothing but the percentage of the total mass of the given compound, that is being contributed by the constituent in question.
In simpler terms, we can say that the percentage composition of any constituent is a way to determine the total contribution of the constituent to the total weight of the compound in a percentage form.
In order to calculate the percentage composition, we must follow the following steps:
We must find the molar mass of all elements in the given compound in gram per mole.
Then, we must find the molecular mass of the entire compound.
After this, we must divide the desired constituent’s molar mass by the entire molecular mass of the compound.
Following which, we must multiply the above number with the number of molecules of the constituent present in the compound.
Finally, multiply the above number with 100 to get the percentage composition of the constituent
If we were to put these steps in the form of a formula, we would get;
% Composition of ‘x’ = $\dfrac{{n \times {M_x}}}{{{M_{comp}}}} \times 100$
Where, n = number of molecules of ‘x’ in the given compound
${M_x}$ = Molar mass of ‘x’
${M_{comp}}$=Molar mass of the compound
Hence, using the above formula for our problem, we get;
% Composition of Pb = $\dfrac{{n \times {M_{Pb}}}}{{{M_{[P{b_3}{{(P{O_4})}_3}]}}}} \times 100$
= $\dfrac{{3 \times 207}}{{811}} \times 100 = \dfrac{{621}}{{811}} \times 100 = 76.5\% $
Hence, Option B is the correct answer.
Note:
Remember that, the sum of all mass percentages should be 100% when added up. It is also known as percent by weight.
Recently Updated Pages
Mark and label the given geoinformation on the outline class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
When people say No pun intended what does that mea class 8 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Name the states which share their boundary with Indias class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give an account of the Northern Plains of India class 9 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Advantages and disadvantages of science
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Bimbisara was the founder of dynasty A Nanda B Haryanka class 6 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
10 examples of evaporation in daily life with explanations
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
How do you graph the function fx 4x class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)