2h2 +o2 → 2h2o what mass of water forms when 1.45 × 10-3 g o2 react completely? (molar mass of o2 = 32.00 g/mol; molar mass of h2o = 18.02 g/mol) 1.63 × 10-3 g 8.16 × 10-4 g 1.29 × 10-3 g

Answer : The correct option is,

Explanation : Given,

Mass of oxygen gas =

Molar mass of oxygen gas = 32 g/mole

Molar mass of water = 18.02 g/mole

First we have to calculate the moles of .

Now we have to calculate the moles of .

The balanced chemical reaction is,

From the balanced reaction we conclude that

As, 1 mole of react to give 2 mole of

So, moles of react to give moles of

Now we have to calculate the mass of

Therefore, the mass water produced is,

the answer is d. 74.02

i believe the answer is three water molecules