Answer:
Explanation
To get a mole of a compound just add up the molar mass
For example: O2
1 mole of oxygen is 16g
1 mole of O2= 32g
You can find the molar mass of each individual element on the periodic table of elements
Answer:
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Answer: 26.7 moles
Explanation: 
As can be seen from the balanced chemical equation 2 moles of hydrogen combine with 1 mole of oxygen to give two moles of water.
1 mole of oxygen give = 2 moles of water.
Thus 13.35 moles of oxygen give=
of water.