One mole of Oxygen produces how many grams of H2O?

Question

One mole of oxygen produces how many grams of H2O?

Answer 1

If you are talking about the synthesis of water using hydrogen and oxygen then the UNBALANCED chemical reaction equation would be:

H₂ + O₂ → H₂O

Step 1: Balance the equation:

2H₂ + O₂ → 2H₂O

Step 2:

Calculate the number of moles of water produced -

Using the balanced chemical reaction equation we see that for every 1 mole of oxygen (O₂) used, there are two moles of water (H₂O) produced. So # of moles of H₂O = 2

Step 3: Calculate the mass of the 2 moles of water -

To do this, you must use the molar mass of water. To calculate the molar mass, look up each element in the periodic table and multiply by the number of atoms of each:

H = 1.008(2) = 2.016

O = 15.999(1) = 15.999

--------------------------------

H₂O = 18.015 g/mol

Multiply the number of moles by the molar mass in grams/mole to get the number of grams:

(2 mol)(18.015 g/mol) = 36.03 grams. Depending on the number of significant figures given, you may wish to round to 36 grams.