How many moles of cobalt atoms are there in 2.00 billion Co atoms?

Answer 1

For this problem, the Atomic Mass is not required. Take the number of atoms and divide it by Avogadro's constant, 6.02 × 1023. Multiply by one mole for the units to cancel.

6.00 × 109 atoms / (6.02 × 1023)= 9.97 × 10-15moles

Answer 2

To find the number of moles of cobalt atoms, we need to divide the number of Co atoms by Avogadro's number. Avogadro's number is approximately 6.022 x 10^23. Thus, 2.00 billion Co atoms is equal to 2.00 x 10^9 / 6.022 x 10^23 moles of cobalt atoms.

Answer 3

You cannot really have 6.00109 atoms. If it is 6 atoms, then divide by Avogadro's number and you get a fraction of a mole: 9.96e-24 mol Co

Answer 4

Not many!

6.0 X 10^9/6.022 X 10^23

= 9.96 X 10^-15

This shows you how big a mole really is, 6.022 X 10^23.

Answer 5

6.022 X 10^23 is one mole of anything, so;

6.00 X 10^9/6.022 X 10^23

= 9.96 X 10^-15 moles of Cobalt

Answer 6

Divide that number by avagodro's number and voila.

Answer 7

1 mole Co = 6.022 x 1023 atoms

2.00 billion = 2.00 x 109

2.00 x 109 atoms Co x 1mol /6.022 x 1023 atoms = 3.32 x 10-15 mole