How many cobalt atoms are in 2 moles of cobalt?

8.98×NA cobalt atoms

Explanation:

N

A

,

Avogadro's number

specifies

6.0221

×

10

23

individual particles. It is simply another collective number like a dozen, or a score, or a gross.

N

A

has the property that

6.0221

×

10

23

individual cobalt atoms has a mass of

58.93

⋅

g.

the answer is option a.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.