1) mol fraction of gas X= 2/(6+2)=2/8=1/4
2) mol fraction of gas Y= 6/(6+2)=6/8=3/4
3) Partial pressure of X = 1/4*2.1 atm=0.53 atm
4) Partial pressure of Y = 3/4*2.1=1.6 atm
Answer: Gas molecules are pulled together by inter-molecular forces.
Explanation:
One of the postulate of the Kinetic Molecular Theory of gas state that, there are no force of attraction or repulsion between gas molecules.
Answer: The density of the liquid is 
Explanation:
Density is defined as the mass contained per unit volume.
Given : Mass of the unknown liquid = 938 grams
Volume of the unknown liquid =
Putting in the values we get:
Thus the density of the liquid is
and the liquid is dimethyl sulfoxide.
The poly atomic ion formula for ammonium would be NH4+