Explain how you can use boyle's law to determine the new volume of gas when its pressure is increased from 270 kpa to 540 kpa? the original volume of gas was 1 l. assume the temperature and number of particles are constant. what is the new volume?

There are several information's already given in the question. Based on the information's the answer can be easily deduced. 

We know the formula

P1*V1/T1 = P2*V2/T2

As the temperature is constant, so T1 and T2 can be negated. The formula changes to 
P1*V1 = P2*V2
70 * 1 = 540 * V2
270/540 = V2
V2 = 0.5

From the above deduction, we can conclude that the new volume is 0.5 liters. I hope that the procedure is clear enough for you to understand.

What’s the solution?

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts