Percentage Composition

Q.

Percentage composition of a compound is the percentage by___of each element present in it.

1. Density

2. None of the above

3. Volume

4. Weight

Q.

What is the percentage composition of iron in ferric sulphate, given mass of iron is 56 amu?

1. 28%

2. 42%

3. 14%

4. 56%

Q.

The mass percentage of nitrogen in urea ($N{H}_{2}CON{H}_2$)is:

1. 
2. 
3. 
4. 

Q.

Percentage composition of hydrogen in benzene ($C_6{H}_6$) is :

1. $8\%$
2. $7.7\%$
3. $50\%$
4. $5\%$

Q.

What is the percentage composition of Water in Gypsum salt?

1. 20.93%
2. 23.60%
3. 21.93%
4. 22.52%

Q.

What are the percentage composition of N and C in Urea respectively?

1. 46.67%, 20%

2. 45%, 15%

3. 46.67%, 18%

4. 45%, 25%

Q.

Urea is a very important nitrogenous fertilizer. Its formula is $CO{N}_2{H}_4$. Calculate the percentage of carbon in urea.

(C = 12, O = 16, N = 14 and H = 1)

Q.

Calculate the percentage composition of each element in Potassium chlorate, $KCl{O}_3$

Q.

Calculate the percentage of phosphorus in :

(a) Calcium hydrogen phosphate Ca$(H_{2}P{O}_4{)}_2$

(b) Calcium phosphate $C{a}_3(P{O}_4{)}_2$

Q.

Find the percentage mass of water in the Epson salt $MgS{O}_4.7H_{2}O$.