1.

The atomic composition of the entire universe is approximately given in the table below: {:("Atom","% of total no. of atoms"),(H,93),(He,7):} Hydrogen atoms constitute what percentage of the universe by mass?

Answer»

0.77
0.23
0.37
0.73

Solution :MASS of 93 'H' atoms=93amu
Mass of 7 'He' atoms=28amu
% HYDROGEN by mass `=(93)/((93+28))xx100=77%`.


Discussion

No Comment Found

Related InterviewSolutions