Number of atoms of He in 100 u of He (atom mass He is 4u) . Options: 1- 25, 2- 50, 3- 100 4- 400

Number of atoms of He in 100 u of He (atom mass He is 4u) . Options: 1

1.	Number of atoms of He in 100 u of He (atom mass He is 4u) . Options: 1- 25, 2- 50, 3- 100 4- 400
Answer» 25<br>The number of atoms present in 100 amu of helium is\xa025 atoms.\xa0To find:Number of atoms = ?Solution:The number of atoms present in 100 amu of helium is to be calculated by using\xa0simple unitary method\xa0knowing that the\xa0a.m.u. is the atomic mass unit\xa0which itself\xa0represent the mass.So thereby, we need to know the "mass of one atom" and that can be divided to know the "number of atoms".Therefore,The "mass of one atom" of helium is known to be 4 a.m.u.Thereby,