Question

Solution of how many atoms of calcium are there in 2 gram of calcium if mass of calcium is given 404

Answer 1

The molar mass of Calcium is 40g

no. of moles of Ca = given mass/ molar mass
= 2/40
= 1/20 moles
Now, 1 mole of Ca contains 6.023 x 10^23 Ca atoms
then in 1/20 moles there are,
$number \: of \: calcium \: atoms \: = \: (1 \div 20) \times 6.023 \times {10}^{23}$

So, no. of Ca atoms = 3.011 x 10^22 atoms

Answer 2

Answer:

it's the correct answer