Question

calculate the mass of 1) one atom of silver 2) one molecule of oxygen 3) one molecule of water​

Answer 1

Answer:

To calculate the atomic mass, the mass

should be multiplied by its natural

abundance.

Now one atom of silver (Ag) = is

1078682 u, (where u = 1.66x10-27kg)

Now, divide it by Avogadro i.e.

numbers of atoms or molecules

present in a substance

Thus, atomic weight of Avogadro is

6.02 x 10^23

Therefore, atomic mass of silver is

107.87/6.02 x 10^23 = 1.792 x 10^-22g

Mass of 1 molecule of carbon-dioxide

(co2) is =

As stated earlier,

No. Of moles =No. of molecules /

Avogadro number

No. Of moles = 1/6.022 x 10^23.

Mass=No. of moles x molecular weight

of CO2

Molecular weight of CO2 = (1x12+2x16)

As atomic mass of carbon and oxygen

are 12&16 respectively 12+32=44

Mass=1/6.022x10^23 x 44

Mass =7.3065 x10^23gm