Question

What is mass in gram of an atom with atomic mass 200 Amu.


ANSWER: 3.32×10^(-22) gram


HOW??☺️​

Answer 1

Answer:

Answer

Correct option is

A

40

Number of nucleon =

Molarmassofnucleon

Massofatom

=

1.6726×10

−24

g/nucleon

3.32×10

−23

g

=19.8=20(approximately)

It is given that element comprises of 2 atoms

Hence,number of nucleon = 2×20=40

Answer 2

Answer:

The atomic weight of O is 16 g/mol.

Mass of 1 mole of O atoms is 16 g.

1 mole of O atoms contains Avogadro's number of atoms or 6.023×1023 atoms.

Mass of 6.023×1023 O atoms is 16 g

Mass of 200 O atoms will be $\frac{16g}{6.023 \times 10²³} \times 200$

=5.31×10‐²¹ g