Answer:
2.4682 x10 to the power 23
Explanation:
Mr = Ca = 1 x40 =40
Cl = 2 x 35.5 = 71
40 + 71 = 111 ( 111 is the Mr )
Moles= 4.56/111 = 0.041 Moles
Now we will do Moles x Avagadro's constant
0.41 x 6.02 x 10 to the power 23
Answer is 2.4682 x10 to the power 23
