a chemical reaction produces oxygen gas. you collect 3.00×1023 oxygen gas molecules at stp .

what volume of oxygen gas did you collect?

We will collect 11.17 liters of oxygen gas.

Explanation:

Where:

N = Number of particles / atoms/ molecules

n = Number of moles

= Avogadro's number

We have:

Molecules of oxygen gas N =

n =?

n = 0.4982 moles of oxygen

Using ideal gas equation:

PV = nRT

where,

P = Pressure of gas = 1 atm (at STP)

V = Volume of gas = 10 L

n = number of moles of gas = ?

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of gas = 273.15 K  (at STP)

Putting values in above equation, we get:

V = 11.17 L

We will collect 11.17 liters of oxygen gas.

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.