Question

A certain ideal gas has atomic mass number 806. A flask of volume 0.0996 m3 holds this gas under pressure 8.36x105 Pa and temperature 304 K.

How many molecules are in the flask? Give your answer is scientific notation.

Answer 1

We know ideal gas equation is given By:

Where

• P is pressure of gas
• Volume of gas
• n=number of moles of gas.
• T is Temperature of gas
• R is Gas constant =8.314 J/mol-K

Putting the Given values in the above equation we have:

Thus number of moles of gas is (n):

Also we know Number of particle N is:

Where is Avgadro number.

Or,

Or there are 1.98x10^25 molecules in the flask.