Agas is contained in a thick-walled balloon. when the pressure changes from 319 mm hg to 215 mm hg, th volume changes from 0.558 l to l and the temperature changes from 115 k to 387 k.

Answer : The volume of gas will be, 2.79 L

Solution :

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 = 319 mmHg

= final pressure of gas = 215 mmHg

= initial volume of gas = 0.558 L

= final volume of gas = ?

= initial temperature of gas = 115 K

= final temperature of gas = 387 K

Now put all the given values in the above equation, we get the final volume of gas.

Therefore, the volume of gas will be, 2.79 L

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: