Choose the arrangement that orders the compounds by increasing boiling point based on predominant intermolecular force. a. CH4 < C4H10 < H2O < NF3
b. C4H10 < CH4 < NF3 < H2O
c. H2O < NF3 < C4H10 < CH4
d. CH4 < C4H10 < NF3 < H

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.