Which correctly describe a reversible reaction reaching equilibrium in a closed system? Select two that apply.

Over time, the rate of the forward reaction becomes zero.
Over time, the rates of the forward and reverse reactions equalize.
Over time, the rate of the reverse reaction becomes greater than the forward reaction.
Initially, the concentration of products is low, so the rate of the reverse reaction is also low.
Initially, the concentration of reactants is low, so the rate of the forward reaction is also low.

All of the following are part of the biosphere except

Find the number of moles of argon in 364g of argon.

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