Aballoon containing 0.0400 mol of a gas with a volume of 500 ml was expanded to 1.00 l. answer the questions and round answers to nearest hundredth place. which equation should you use to find the amount of gas added?

Answer : The amount of gas added, 0.08 mole

Solution :

According to the Avogadro's law, the volume of gas is directly proportional to the number of moles of gas at constant temperature and pressure of gas.

or,

where,

= initial volume of balloon = 500 ml = 0.5 L

= final volume of balloon = 1 L

= initial moles of gas = 0.0400 mole

= final moles of gas = ?

Now put all the given values in the above formula, we get the amount of gas added.

Therefore, the amount of gas added, 0.08 mole

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.