A message to curreysauce (1 Viewer)

[Sepulchres]

Something like...

An adult needs ***mg of zinc each day. An oyster contains approximately ***ppm zinc. How many oysters does an adult need to eat per day to achieve the required level of zinc?

That was probably very different from the actual wording, and I've replaced forgotten numbers with ***s. But you get the drift. Our problem is, we don't know the mass of the oyster.

Couldnt you just find the number of moles of zinc required per day and then equate it with the numebr of oyesters times the concentration? Like this...

m(Zn) = ***ppm x (no. of oyesters)

Im probably wrong but thats the only way I see of doing it...

Edit: Now that I think of it, I think you just leave the left hand side as mg's instead of moles. But it still doesnt add up for some reason. I hate being confused by questions the day before exam day =\

 

[velox]

xrtzx its in the cssa thread.

 

[richz]

it is o nice... which one, do u have a link??

opps i meant question paper....