Question

(b)Calculate the percentage of hydrogen in water.Given that The relative atomic masses of H=1,0=16.​

Answer 1

Answer:

The percentage of an element in a compound is 100 times the fraction, so for water the mass percent hydrogen is 11.11% and the mass percent oxygen is 88.89%

Explanation:

Correct option is

A

11.1, 88.90

Molecular mass of H

2

O=2+16=18g

As there are 2 hydrogen atoms in 1 mole of water ; Molar mass of H in 1 mole of H

2

O=1×2=2g

Therefore %age of H in H

2

O =

18

2

×100=11.1%

Also molar mass of O in 1 mole of H

2

O =16g Therefore %age of O in H

2

O =

18

16

×100=88.9%

Answer 2

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In the first law, an object will not change its motion unless a force acts on it.

In the second law, the force on an object is equal to its mass times its acceleration.

In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

$\bold\mathbb{Answered \: By \: Ayush8378 }$

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