Aballoon containing 0.10 moles of gas has a volume of 2.00 liters. if temperature and pressure remain constant, the new volume will be 3.00 liters when you add 0.15 moles of gas to the balloon.

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Step-by-step explanation:

Knowing all the concentrations and volume  

Initial number of moles of gas n1= 0.10 moles  

Initial volume of Balloon V1= 2 Lit

Final number of moles n2 = 0.15 moles

Final volume will be V2=  ?

According to Avogadro’s law  

n1/V1 =n2/V2

V2=   n2 xV1/n1

  = 0.15 x 2/ 0.10

= 3 Lit

If temperature and pressure remain constant, the new volume will be 3 liters