Which class of compounds is responsible for the scents and flavors of many fruits? amides amines ethers esters

The rock in a lead ore deposit contains 89 % pbs by mass. how many kilograms of the rock must be processed to obtain 1.5 kg of pb?

What three things determine the shape and size of a puddle when water is poured out onto a surface

Which are forms of frozen water? check all that apply. dew frost hail rain sleet