How many helium atoms are in a 12.0 g sample?

The number of helium atoms present are

Explanation:

To calculate the number of moles, we use the equation:

Given mass of helium = 12.0 g

Molar mass of helium = 4 g/mol

Putting values in above equation, we get:

According to mole concept:

1 mole of an element contains  number of atoms.

So, 3 moles of helium will contain = number of atoms.

Hence, the number of helium atoms present are

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.