Carbon dioxide (1.100g) was introduced into a 1l flask which contained some pure oxygen gas. the flask was warmed to 373k and the pressure was then found to be 608mmhg. if co2 and o2 were the only gases present, what was the mass of the oxygen in the flask?

Answer : The mass of oxygen present in the flask is 0.03597 grams.

Explanation :

First we have to determine the moles of gas.

Now we have to calculate the moles of the oxygen gas.

Using ideal gas equation:

As, the moles is an additive property. So,

where,

P = pressure of gas = 608 mmHg = 0.8 atm

(conversion used : 1 atm = 760 mmHg)

V = volume of gas = 1 L

T = temperature of gas = 373 K

= number of moles of oxygen gas = ?

= number of moles of carbon dioxide gas = 0.025 mole

R = gas constant =

Now put all the given values in the ideal gas equation, we get:

Now we have to calculate the mass of oxygen gas.

Therefore, the mass of oxygen present in the flask is 0.03597 grams.

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.