Question

The number of atoms in 5.78 mol NH4NO3. Show your work.

Answer 1

Answer:

3.481 x 10²⁴ atoms

Explanation:

Data Given:

Number of moles of NH₄NO₃ = 5.78 mol

Number of atoms of NH₄NO₃ = ?

Solution:

Formula used

                  no. of moles = no. of atoms / Avogadro's number

As we have to find no. of atoms

So, we have to rearrange the above equation

                  no. of atoms = no. of moles x Avogadro's number . . . . . (1)

Where

Avogadro's number = 6.022 x 10²³ atoms

Put values in above Equation 1

                      no. of atoms = 5.78 mol x 6.022 x 10²³ atoms/mol

                      no. of atoms = 3.481 x 10²⁴ mol

So,

no. of atoms in 5.78 mole NH₄NO₃ = 3.481 x 10²⁴ atoms

Answer 2

Answer:

The answer is 3.48 × 10²⁴

Explanation:

Avogadro's constant/number is used to get the actual number of particles (atoms or ions) in a molecule of a substance.

Avogadro's number is 6.022 × 10²³

To get the actual number of atoms in a substance: avogadro's constant is multiplied by the number of moles of the substance

Hence,

number of atoms = 5.78 × 6.022 × 10²³

number of atoms in 5.78 moles of NH₄NO₃ = 3.48 × 10²⁴