Answer:
A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance
For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu). By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atomatom
The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D)
1 atomic mass unit =
1.66053904 × 10-27 kilograms
for example:
Atomic mass of one molecule of H2SO4 is 98 Atomic mass unit.
Atomic mass of one mole of H2SO4 is 98 grams.
So 98 grams of H2SO4 contains 1 mole of H2SO4 molecule i.e., 7 moles atoms.
So, by applying the basic maths, we get
49 grams of H2SO4 contains 1/2 mole of H2SO4 molecule i.e., 3.5 moles atoms.
Answer:
A mole is the amount of a substance which contains 6.20×10 power 3
