Question

What is the mass of (atomic mass of oxygen-16 and hydrogen-1)
() 02 mole of oxygen atama!
(b) 0.5 mole of water molecules?
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Answer 1

Answer:

a) 16g ( g for grams )

a) the 1 molar mass has the same magnitude for the respective substance as it has in its molecular or atomic mass but the unit changes to gram.

b) Molecular mass of water = 2amu of H2 + 16amu of oxygen i.e. 18amu

now 0.5 means half molar mass = 0.5 × 18 = 9grams

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