Which of the following contains maximum no. of molecules?
i) 200 cc of $N H_{3}$ at S.T.P

ii) 150 cc of $N_{2}$ at S.T.P

iii) 50 cc of $S O_{2}$ at S.T.P

iv) 150 cc of $O_{2}$ at S.T.P

200 cc of

at S.T.P

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150 cc of

at S.T.P

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50 cc of

at S.T

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150 cc of

at S.T.P

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Solution

The correct option is A 200 cc of at S.T.P
According to Avogadro's Law - Under the same conditions of temperature and pressure equal volumes of all gases contain the same number of molecules.

So,

200 cc of $N H_{3}$ at S.T.P contains more molecules than other gases as the volume is more. So the number of molecules will be more when compared to other given gases according to Avogadro's Law.

150 cc of $N_{2}$ at S.T.P and 150 cc of $O_{2}$ at S.T.P occupies the same volume and the same number of molecules.

50 cc of $S O_{2}$ at S.T.P have less number of molecules as its volume of gas is less when compared to other given gases.

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Which of the following contains maximum no. of molecules? i) 200 cc of NH3 at S.T.P ii) 150 cc of N2 at S.T.P iii) 50 cc of SO2 at S.T.P iv) 150 cc of O2 at S.T.P

Which of the following contains maximum no. of molecules?
i) 200 cc of $N H_{3}$ at S.T.P

ii) 150 cc of $N_{2}$ at S.T.P

iii) 50 cc of $S O_{2}$ at S.T.P

iv) 150 cc of $O_{2}$ at S.T.P