Given the reaction: 2H₂ + O₂ → 2H₂O The total number of grams of O₂ needed to produce 54 grams of water is .

Answer : The mass of needed are, 48 grams.

Explanation :

First we have to calculate the moles of

Now we have to calculate the moles of

The given balanced chemical reaction is:

From the reaction, we conclude that

As, 2 mole of produces from 1 mole of

So, 3 mole of produces from mole of

Now we have to calculate the mass of

Molar mass of = 32 g/mole

Therefore, the mass of needed are, 48 grams.