Suppose you were dissolving a metal such as zinc with hydrochloric acid.how would the particle size of the zinc affect the rat eof its dissolution?

A person on oxygen only sleep with it sometimes has red eyes still smokes and mean can't breath walking will body shut down?

Once in a while, I have this weird feeling in my chest that I cannot get enough air. I breathes fine, but it seems like my lungs are not capable of getting the oxygen. I feel very weak and dizzy because of it. Even though it only happens once in a while, for a sort time, it happens. I would...

I don't mean to be anal about this but I've recently stumbled upon this topic over the holidays and I'm thoroughly interested. What I fail to understand is Order's of Reactions with respect to & . Can someone give me a well concise explanation of this with a good example, say the decomposition...

I'm moving away from clamp-on shrader valves (considered temporary and leaky) and moving to sweated valves and would like to know if Oxy/acetyne combo is the way to go for this. Brazing, right? I've tried mapp gas but it seems to not heat enough, even though I haven't tried the "cup" that goes on...