Answer :
The number of mole of O = 1.11 mole
What is gram and weight?
One gramme is equal to one thousandth (1 x 10-3) of a kilogramme in the metric system. The original definition of a gramme was the mass of one cubic centimetre of pure water at 4 degrees Celsius (the temperature at which water has maximum density)
One gramme of molecular mass is equal to a substance's molecular weight, which is the sum of the masses of the atoms in its molecular formula. It is equivalent to the molecular mass of a molecule expressed in grammes.
The atomic mass of a periodic table element is measured in grammes. The term "molar mass" refers to an element's weight in grammes per mole. An element's molecular mass is equal to its atomic mass in grammes. It can be calculated by converting an element's atomic weight from the periodic table to grammes.
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