Percent composition Quiz 1

Question 1

Find the percent composition of Magnesium in $$Mg{{\left( OH \right)}_{2}}$$ .

Accepted Answer

41.68

Answer

42.95

Answer

58.23

Answer

28.25

Question 2

Calculate the percentage composition of fluorine in calcium fluoride $$(Ca{{F}_{2}})$$

Accepted Answer

49.00

Answer

58.00

Answer

58.28

Answer

28.35

Question 3

There is a chemical which contains two hydrogens and one oxygen in its molecular formula. Find the percent composition of the oxygen?

Accepted Answer

88.89%

Answer

58.23%

Answer

25%

Answer

91 %

Question 4

Calculate the percent composition of each and every element present in hydrochloric acid?

Accepted Answer

2.76 % of hydrogen, 97.24 % of chlorine

Answer

2.90 % of hydrogen, 97.10 % of chlorine

Answer

50% of hydrogen and 50 % of chlorine

Answer

25 % of hydrogen and 75 % of chlorine

Question 5

Whenever metals are reacting with acids they will release gases to the atmosphere. Find the composition of every element present in the gas which is going to be released during the above mentioned condition.

Accepted Answer

100 % of hydrogen

Answer

200% of hydrogen

Answer

25 % percentage of hydrogen

Answer

None of the above.