How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

Option (b) is the correct answer.

Explanation:

It is given that mass of Mg is 97.22 g and it is known that molar mass of Mg is 24.305 g/mol.

So, calculate the number of moles as follows.

          No. of moles =

                                 =  

                                 = 4 mol

Also, it is known that 1 mole has atoms/mol. Therefore, calculate the number of atoms in 4 mol as follows.

               = atoms

or,            = atoms

Thus, we can conclude that there are atoms in 97.22 grams of Mg.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

the dissolution of polymer can be thermodynamically described in 2 steps.