Astudent places 15.0 ml of water in a graduated cylinder. she then places an object with an
into the same cylinder. the final volume now reads 20.0 ml
a. what is the volume of the unknown object?
. if the object has a mass of 23 g, what is its density to one decimal place? do not forget units. (density
mass/volume)

d = 4.6 g/mL

Explanation:

Volume of water = 15.0 mL

Final volume after placing object = 20.0 mL

Volume of object = ?

Mass of object = 23 g

Density of object = ?

Solution:

Volume of object = Total volume - volume of water

Volume of object = 20.0 mL - 15.0 mL

Volume of object = 5.0 mL

Density of object:

density = mass/ volume

d = m/v

d = 23 g/ 5.0 mL

d = 4.6 g/mL

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.

c. orbital shape i hope this is correct