Question

Calculate
a) The mass of one atom of oxygen. b) The mass of one molecule of oxygen. c) The mass of one ion of oxygen.

Answer 1

1. The mass of one atom of oxygen is around 16 grams ( 15.9994 g to be precise)
2. The mass of one molecule of oxygen is 16.00 amu.
3. The mass of one ion of oxygen is 16 u.

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Answer 2

Hello friend,
Here's your answers:

a) Mass of one Oxygen Atom = 2*8 = 16 amu
Because the atomic mass of Oxygen = 16 amu

b) Mass of one Oxygen Molecule = 2*(2*8) = 32
Because the double of the mass of the Oxygen atom. Because 1 molecule contains 2 atoms.

c) Not sure about this. Generally, Oxygen can get O^(-1). So one electron has added.
So Mass of Oxygen ion = 9 (or) 18 amu. (not sure)

Hope my answer helps you.