Question

How many molecules are
present in 42g
nitrogen? [Atomic mass of
nitrogen =14]​

Answer 1

Answer:

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

Explanation:

Answer 2

Answer:

18.066 * 10^23

Explanation:

atomic mass of nitrogen = 14g

mass of given nitrogen= 42g

number of moles in 42 g nitrogen = 42/14

                                                        = 3

one mole of nitrogen contains 6.022 * 10^23 molecules

so, 3 moles of nitrogen (42 g of nitrogen ) contains = 3 * (6.022 * 10^23)

                                                                                     = 18.066 * 10^23 molecules