Answer : The final pressure will be, 666.2 mmHg
Explanation :
Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.
or,
where,
= initial pressure = 790 mmHg
= final pressure = ?
= initial volume = 101.2 mL
= final volume = 120 mL
Now put all the given values in the above equation, we get:
Therefore, the final pressure will be, 666.2 mmHg
M(N)=21.2 g
M(N)=14.007 g/mol
n(N)=m(N)/M(N)
n(N)=21.2g/(14.007g/mol)=1.51 mol
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I believe that number 27 is A