Salvatore T. answered 03/25/20
Italian college student majoring in Biology.
you should think of moles as dozens.
we use dozens to indicate 12 so if I say give me 7 dozens of eggs you just multiply 12x7
1 mole is defined by the Avogadro number (6.02214076 × 1023 ).
In other words one mole is equal to 6.02214076 × 1023 .
long story short, This number was created to find a way to calculate the number of molecules or atoms since they are extremely small.
One mole of calcium hydroxide then is made of 6.02214076 × 1023 molecules.
multiplying this number by 7 you get the 42.16 x 10^23 molecules.