Question

How many moles of o2 would be required to produce 4 mol h2o?

Answer 1

Hii there !

The reaction accompanying production of water in this case would be -

`\green{ \underline { \boxed{ \sf{2H_2+O_2\longrightarrow 2H_2O}}}}`

Thus ,by observing the reaction, we can conclude that 2 mole of Hydrogen
`(H_2 )`react with 1 mole of oxygen
`(O_2)`to produce 2 mole of water
`(H_2O)`

Now,

To produce 1 moles of water.

Moles of Oxygen
`(O_2)` required
`= (1)/(2)` moles

Similarly,

To produce 4 moles of water.

`\implies` Moles of Oxygen
`(O_2)` required =
`(1)/(2)* 4` moles

`\implies` 2 moles

Hope it helps.