Question

$2H_2+O_2\to 2H_{2}O$

What can be infered from the above equation?

• A. 2 molecules of hydrogen combines with 1 molecule of oxygen to form 2 molecules of water.
• B. 4 u of hydrogen molecules combine with 32 u of oxygen molecule to form 36 u of water molecules.
• C. 2 moles of hydrogen combines with 1 mole of oxygen to form 2 moles of water.
• D. All of these.

Answer 1

The correct option is D

All of these.

(i) 2 molecules of hydrogen combines with 1 molecule of oxygen to form 2 molecules of water.

(ii) 2 moles of hydrogen combines with 1 mole of oxygen to form 2 moles of water.

(iii) 4 u of hydrogen molecules combine with 32 u of oxygen molecule to form 36 u of water molecules.

1 mole = 6.02314 $\times$ ${10}^{23}$ particles.

The statements (i) and (ii) represent the number of molecules involved in the reaction while statement (iii) gives the mass of the entities involved.