Hel pl what would be the mass of 4.28 x 10^23 molecules of ammonia (NH3)?

Your question is not clear but if you can explain yourself i would be glad to .  just trying to : ))

Kim jong un.yeet jkany leaking in the power plant can directly cause radiation and other bio hazards.brainliest answer pls.

Rate law for this reaction israte of the reaction = k[a]²[b].second order in a  means concentration of a in power of two, and  first order in b means concentration of b in power of one.