a sample of oxygen gas occupies a volume of 25.0ml at 740.0 torrent what volume will occupyat 800.0 torr

23.1mL

Explanation:

Given parameters:

Initial volume of the gas = 25ml

Initial pressure  = 740torr

Final pressure  = 800torr

Unknown:

Final volume  = ?

Solution:

To solve this problem, we apply Boyle's law which states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant"

         P₁ V₁   = P₂ V₂

P and V are pressure and volume

1 and 2 are initial and final states

       Insert the parameters and solve;

      740 x 25  = 800 x v₂

            v₂  = 23.1mL

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

see earlier