Question

( P=10^{-6} mathrm{mm} ) of ( mathrm{Hg} )
( V=12 )
( T=273+25=298 mathrm{k} )
( P rightarrow quad 760 quad m m ) of ( H g=1 ) atm
( 10^{-6} mathrm{mm} ) of ( mathrm{Hg}=? )
( x=frac{10^{-6} x 1}{760}=1.316 times 10^{-9} mathrm{at} )
Applying ges lqw ( P V=n R T )
( 1-316 times 10^{-9} times 1=n times 0.0821 times 298 )
( n=5.4 times 10^{-11} ) moles
mole ( =6.02 times 10^{23} ) molecules
( 5 cdot 4 times 10^{-11}=5 cdot 4 times 6 cdot 02 times 10^{12} )
moles ( 32 cdot 51 times 10^{12} ) molecules
( 3 cdot 25 times 10^{13} ) molecules

# 6. 1 L of a gas is at a pressure of 10 °mm of Hg at 25°C: How many molecules are present in the vessel? a. 3.2 x 10 b. 3.2 x 1013 [2011] C. 3.2 x 1010 d. 3 x 104 JUU liquofiod hoonuse 20091

Solution