Which of the following pairs have same number of molecules?....

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Which of the following pairs have same number of molecules?
\( \mathrm{P} \)
(1) \( 2 \mathrm{~g} \) of \( \mathrm{O}_{2}, 4 \mathrm{~g} \) of \( \mathrm{SO}_{2} \)
(2) \( 2 \mathrm{~g} \mathrm{CO}_{2}, 2 \mathrm{~g} \) of \( \mathrm{N}_{2} \mathrm{O} \)
(3) \( 224 \mathrm{ml} \mathrm{O}_{2} \) at STP, \( 448 \mathrm{ml} \) of He at \( 0.5 \mathrm{~atm} \) and \( 273 \mathrm{~K} \)
(4) \( 2 \mathrm{~g} \) oxygen and \( 2 \mathrm{~g} \) ozone


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