How many effusion steps are needed to purify a gas mixture of 70% hydrogen sulfide/30%
ammonia to 99% hydrogen sulfide?

Identify the correct mole ratio for each substance. sodium chloride (nacl) na: cl = 1: ammonium nitrate (nhno) h: o = 4:

What is the popular use of lithium batteries

Chris is about to do an experiment to measure the density of water at several temperatures. his teacher has him prepare and sign a safety contract before beginning the experiment. which term is mostlikely part of the safety contract