If bromine atom is in the form of say isotopes `"_35^79Br` (49.7%) and `"_35^81Br` (50.3%) then calculate the average mass of bromine atom.

Chlorine has two isotopes "_17^35Cl And "_17^37Cl in the ratio 3:1 . Calculate the average atomic mass of chorine.

The relative abundance of various isotopes of silicon is as:Si-28=92.23%,Si-29=4.67% and Si-30=3.10%. Calculate the average atomic mass of silicon.

Osmotic pressure of a solution containing 3.5 g of dissolved protein per 50cc of a solution is 25 mm. at 37^@C . Calculate the molar mass of protein.

Carbon occurs in nature in the form of two isotopes with atomic mass 12 and 13 respectively. If average atomic mass of carbon is 12.011 u , what is the % abundance of the two isotopes ?

Nitrogen occurs in nature in the form of two isotopes with atomic mass 14 and 15 respectively. If average atomic mass of nitrogen is 14.0067, what is the % abundance of the two isotopes ?

B has two isotopes 10B (19%) and 11B( 81%) . What is the atomic mass of B .

The three stable isotopes of neon: "_10^20 Ne , "_10^21Ne and "_10^22Ne have respective abundances of 90.51%, 0.27% and 9.22%. The atomic masses of the three isotopes are 19.99 u, 20.99 u and 21.99 u,respectively. Obtain the average atomic mass of neon.