Question

A mixture of hydrogen and oxygen is ignited and reacts completely to form water. Which mixture will produce 18gm of H2O.

Options in the pic

Plz answer​

Answer 1

(A) 2.0g H₂, 16.0g O₂

Answer 2

The mixture of 2.0 g $H_2$ and 16.0 g of $O_2$ will produce 18 g of $H_2O$

Explanation:

Law of conservation of matter : It states that matter can neither be created nor be destroyed but it can only be transformed from one form to another form. The balanced chemical reaction always follow the law of conservation of mass.

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

The given chemical reaction is,:

$H_2+\frac{1}{2}O_2\rightarrow H_2O$

Mass of products = Mass of water = 18 g

Mass of reactants = Mass of hydrogen + mass of oxygen = ?

As Mass of products = Mass of reactants = 18 g

Mass of hydrogen + mass of oxygen = 18 g = 2.0 g + 16.0 g

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