a 85.00 g piece of metal of 80.0 C then placed in a beaker containing 200.0 g of water at 20.0 C the temperature of the water rises to 28.0 C calculate the specific heat of the metal

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

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.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.