A gas of 250 ml at 20°C and 720 Torrs. What volume would the gas occupy at STP ?

The gas would occupy volume of 221 ml at STP

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

where,

= initial pressure of gas = 720 torr

= final pressure of gas = 760 torr (at STP)

= initial volume of gas = 250 ml

= final volume of gas = ?

= initial temperature of gas =

= final temperature of gas =   (at STP)

Now put all the given values in the above equation, we get:

The gas would occupy volume of 221 ml at STP

The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.

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