Question

Calculate the number of atoms in 14 U of nitrogen

Answer 1

6.02× 10 ^23

✌✌......

Answer 2

Step one: Convert grams to moles

14g N x 1 mol/14.01 g = 1.0 mol (rounded to correct number of sig figs I feel 14 isn’t an exact number.)

Step two: Convert moles to atoms

1 mol x 6.022x10^23 atoms/1 mol = 6.022 x 10^23 atoms

The correct answer is 6.0 x 10^23 atoms when rounded to the correct number of sig figs. If 14gs of Nitrogen was given as an exact number, the answer would be 6.022 x 10^23 atoms .

6.022 x 10^23 is known as Avogadro’s number and is the number of atoms per one mole.