Determine the volume of 15.64 grams of iron if its density is 2.27 g/cm3

The answer is

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

From the question

mass of iron = 15.64 g

density = 2.27 g/cm³

The volume is

We have the final answer as

Hope this helps you

i think it's letter a.

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.