Question

The mass of an atom of hydrogen is 1.008 u. What is the mass of 18 atoms of hydrogen

Answer 1

Answer:

if mass of one atom = 1.008u ,then

mass of 18 atoms of hydrogen =1.008×18 =18.144u

Explanation:

Answer 2

Answer:

Explanation:

Mass of one atom of hydrogen is 1.008

Thus, molar mass of a hydrogen is 1 g

Mole of one atom is No.of atom ÷NA

Mole of 18 atoms =18÷NA

                            = 3×10^-23

Mass of 18 atoms = Mole × MM

                               = 3×10^-23×1

                               =3×10^-23..

That's answer..pls make me brainlist