Question

calculate the number of moles of 20 gram of CA

Answer 1

mole= mass/molar mass
mole= 20/40
mole= 1/2g

Answer 2

Avagadro’s number, which is 6.022x10 have agram weight equal to the atomic mass.

As we know that in one mole of Ca, there are 6.022x10 to the 23rd atoms.

So then we fined the atomic mass of Ca = 40gms

As we know about the formula which used for the calculation as

Moles= mass/ molar mass

So here mass is given as= 20gram

And molar mas we haves for Ca =40g

So when we calculate all these the answer will we fined as 0.5 thanku