Forty liters (40 L) of a gas were collected over water when the barometer read 622.0 mm Hg and the temperature was 20 degrees celcius. What volume would the dry gas occupy at standard conditions? (Hint: consider Dalton's law of partial pressure.)

Show work/calculations.

the answer is the first option

explanation:

just googled it m8. not that hard

lol

you need to stop taking that class

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.