Prelaboratory Assignment: A 3.00 mL aliquot of 6.75 x 104 M Cu2+ was added to each flask in a series of 10, 25.00
mL volumetric flasks. A different volume of 5.10 x 10-4 M NaS2CN(C2H5)2 solution was
added to each flask and the flasks were filled to the mark with methanol. The
absorbances of the solutions were measured and plotted as a function of the volume of
the added ligand.
The plotted data contained three linear portions. The first and second lines intersected
at 3.80 ml, and the second and third lines intersected at 8.25 mL. Find the ratio of
ligand to metal at both intersections.

i would say b

explanation:

but i think i would need more information than that

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

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.

explanation:

0.07 g/cm³

1.37 g/cm³