Question

find the no. of moles of oxygen required to produce 100 moles of water through the process
H2 +1/2 O2 = H2O
please help

Answer 1

Given:

A process is given as: H2 +1/2 O2 = H2O.

To find:

The number of moles of oxygen required to produce 100 moles of water through the given process.

Solution:

As we can see from the equation that formation of one mole of water is formed by half mole of Oxygen.

If we need to produce 100 moles of water then we would require half the number of moles of Oxygen, i.e. 50 moles.

The number of moles of oxygen required to produce 100 moles of water are 50 moles.

Answer 2

Given:

$\boxed{ \sf H_{2}+ \dfrac{1}{2} O_{2}\rightarrow H_{2}O}$

To find:

Moles of oxygen required for production of 100 moles of water?

Calculation:

We need to use UNITARY METHOD to solve these types of questions !

$\sf H_{2}+ \dfrac{1}{2} O_{2}\rightarrow H_{2}O \\ \\ 1 \: \: \: \: \: \: \: \: \: \: \frac{1}{2} \: \: \: \: \: \: \: \: \: \: \: \: \: 1$

So, 1 mole of Hydrogen reacts with ½ mole of oxygen to produce 1 mole of water.

Considering oxygen as the limiting reagent:

Moles of oxygen required for 100 moles of water

$\sf = \dfrac{1}{2} \times 100$

$\sf= 50 \: moles$

Hence, 50 moles of oxygen is required.