Question

What is the mass of 1.20×10^23 atoms of cobalt?(at mass of Co+58.9u).​

Answer 1

Answer:

Explanation:

1 mole = 58.9 = 6.022*10^23

1.20×10^23  contains  1.20×10^23  *58.9/6.022*10^23

= 11.7 u of cobalt

Answer 2

Answer: 11.7 grams

Explanation: Mass of cobalt = 58.9u

Mass of 1.20×10^23 =58.9/6.022×10^23

=11.7grams