the weight of 350ml gas at 0 degree Celsius and 2 ATM pressure is 1 gram calculate the weight of one molecule of gas.

Your atom OXYGEN with MW= 16, I mean weight,

How it comes its very simple, let me show you the calculation part.

You must be familiar with ideal gas law, very famous

PV=nRT

now as you mentioned

Our P=2atm, V=350 ml, R= 0.082 lit.atm/Mol.K & T= 0'c or 273K

Put up all the value in above equation

Here is one tricky part where people often makes mistakes.

In equation n is equal to n/2 , because our gas is diatomic.

Thats it, you will get n i.e. no. of moles = 0.0625

Now, putting very simple equation i.e.

Weight= moles * MW

Where, weight= 1g as you mentioned in question.

That will turn out to be

MW = 16

which stands for OXYGEN.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml