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Question

Find the expression that can be used to designate 3 moles of atoms.

A
H2(g)
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B
CO2(g)
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C
2N2O(g)
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D
2NaCl(aq)
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E
H2SO4(dilute aq)
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Solution

The correct option is D CO2(g)
The expression that can be used to designate 3 moles of atoms is CO2(g).
It corresponds to one mole of CO2 molecules or three moles of atoms.
The expressions H2(g) , 2N2O(g) , 2NaCl(aq), H2SO4 (dilute aq) designate 2 moles, 6 moles, 4 moles and 7 moles of atoms respectively.

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