Question

How many atoms are in 3.5 moles of calcium?

Answer 1

Answer:

sine Ca atomic mass is 40

one mole contain that much of atom

1\times 6.022 \times 10 {}^{23}1×6.022×10

23

5 mole contains

5 \times 6.022 \times 10 {}^{23}5×6.022×10

23

30.11 \times 10 {}^{23}30.11×10

23

it is the answer