What is the number of Joules needed to change 40.0 grams of water at 100°C to steam at the same temperature and pressure?
1.13,360 J
2.90,400 J
3.167.2 J
4.16,720 J

yes

explanation:

search chemistry final b exam in google and a site called quizlet will pop up

c. is the answer

by love gaming

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.