Question

(b) 4.9 g of sulphuric acid contains 0.1 g of hydrogen, 1.6 g of sulphur and rest oxygen
Calculate the mass percentage composition of all the elements of sulphuric acid.
[2.04%, 32,65%, 65.31%)
dog of valency. Give
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Answer 1

The mass percentage of hydrogen, sulfur and oxygen are 2.04 %, 32.65 % and 65.31 %

Explanation:

We are given:

Mass of sample = 4.9 g

Mass of hydrogen = 0.1 g

Mass of sulfur = 1.6 g

Mass of oxygen = (4.9 - (0.1 + 1.6)) = 3.2 g

To calculate the mass percentage of calcium ions in milk, we use the equation:

$\text{Mass percent of element}=\frac{\text{Mass of element}}{\text{Mass of sample}}\times 100$          ........(1)

• For hydrogen:

Putting values in equation 1, we get:

$\text{Mass percent of hydrogen}=\frac{0.1g}{4.9g}\times 100=2.04\%$

• For sulfur:

Putting values in equation 1, we get:

$\text{Mass percent of sulfur}=\frac{1.6g}{4.9g}\times 100=32.65\%$

• For oxygen:

Putting values in equation 1, we get:

$\text{Mass percent of oxygen}=\frac{3.2g}{4.9g}\times 100=65.31\%$

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