H-Chromen is Select one:

a. benzo(b)pyran

b. acridinone

c. benzo(c)pyran

d. benzo(b)pyrole​

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

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.

Anyone who's in connections academy chemistry b have the factors that affect the rate of a reaction portfolio already done?