One 55-gram serving of a particular cereal supplies 270 mg of sodium, 11% of the recommended daily allowance. How many moles and atoms of sodium are in the recommended daily allowance?

The moles of sodium are 0.012 moles and number of atoms are that are recommended daily allowance

Explanation:

We are given:

Mass of sodium recommended in daily allowance = 270 mg

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

Given mass of sodium = 270 mg = 0.270 g    (Conversion factor: 1 g = 1000 mg)

Molar mass of sodium = 23 g/mol

Putting values in above equation, we get:

According to mole concept:

1 mole of an element contains number of atoms

So, 0.012 moles of sodium will contain = number of atoms

Hence, the moles of sodium are 0.012 moles and number of atoms are that are recommended daily allowance