Question

what is the mass of 4 moles of calcium atoms ( atomic mass of calcium = 40)
Please it's urgent​

Answer 1

Explanation:

Given:atomic mass of calcium is 40u.No. of moles =given weight/molecular weightNo. of Cu moles=0.4/40=1/00=0.01molesWe know that 1 mole of any substance contains 6.023 x 10²³ atoms/ molecules/ions1mole of Cu contains=6.023 x 10²³ atoms of Cu0.