Consider three 1L flask at STP. Flask A contains NH3, flask B contains NO2 gas and flask C contain N2 gas. Which constains the largest number of molecules?

Answer : All flask contains the same number of molecules.

Explanation :

As we know that at STP,

Pressure of flask = 1 atm

Temperature of flask = 273 K

Volume of flask = 1 L

The given molecules are,

Every molecule contains equal number of molecules that is, 1.

That means all the value of variables are same. Thus, all flask contains the same number of molecules.

Hence, all flask contains the same number of molecules.

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