calculate the mass of 2 molecule of oxygen
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2
Answer:
Molecular mass is obtained by multiplying the atomic mass of an element with the number of atoms in the molecule and then adding the masses of all the elements in the molecule.
O2 is a diatomic molecule.
The mass of an oxygen atom = 16 amu.
∴ Mass of O2 molecule = 2 × 16 = 32 amu.
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ANSWER
The molecular weight of oxygen is 32 g/mol.
Hence, one mole of oxygen weighs 32 g.
One mole of oxygen contains 6.023×10
23
molecules.
The mass of one molecule of oxygen is:
6.023×10
23
32
=5.31×10
−23
g.
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