Which component of a milankovitch cycle is related to periodic ice ages throughout earth's history?

a. cloud cover feedback
b. precession of the ecliptic
c. axial precession
d. apsidal precession

Different isotopes indicate that an element will have different numbers of

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices

How many atoms are in 2 moles of phosphorus?