Asolid mixture weighs 0.6813 g. it contains gallium bromide (gabr3) and other inert impurities. when the solid mixture was dissolved in water and treated with excess silver nitrate (agno3), 0.368 g of agbr was precipitate. a balanced chemical equation describing the reaction is provided below. gabr3(aq) + 3 agno3(aq) ⟶ 3 agbr(s) + ga(no3)3(aq) what is the percent of mass of gabr3 in the solid mixture?

29.6%

Explanation:

Let's consider the following balanced equation.

GaBr₃(aq) + 3 AgNO₃(aq) ⟶ 3 AgBr(s) + Ga(NO₃)₃(aq)

We can establish the following relations.

The mass of GaBr₃ that produced 0.368 g of AgBr is:

The mass percent of GaBr₃ in the 0.6813 g-sample is:

(0.202g/0.6813g) × 100% = 29.6%

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.