Question

how many atoms are there in 2.50 moles of oxygen

Answer 1

Answer:

Avogadro's number tells you how many particles there are in a mole. There are 6.022×1023 O atoms in a mole of O atoms. There are 6.022×1023 O2 molecules in a mole of O2. Since you have 2 oxygen atoms in one O2 molecule, there are 2×6.022×1023 O atoms in a mole of O2.

Answer 2

Given: 2.50 moles of oxygen

To find: Number of oxygen atoms present

Solution: oxygen that is O2 has 2 atoms of oxygen in its each molecule

we are given its mole and we need to find the number of atoms present in it, for that we will find how many molecules are present in that

formula going to be used here is

Mmolec= n× NA

here Mmolec is the number of molecules present in a substance, n is the number of moles of that substance, NA is Avogadro's Number

Mmolec = 2.5× 6.022×10^23

The number of atoms will be twice of Number of molecules

Natoms= 2×2.5×6.022×10^24

Number of atoms= 3.01 ×10^24

Therefore, a number of atoms present in 2.50 moles of oxygen are 3.01 ×10^24.