Number of men required to stand on top of each other to reach moon from earth are :

You can determine if the substance is an acid (below 7) or a base (above 7). It also depends on the type of paper that you use, like litmus paper.
Mg(s) + 2 AgNO₃(aq) = Mg(NO₃)₂(aq) + 2 Ag(s)
reaction is :<span> single replacement
hope this helps!</span>
Kc=24.4=[HX]∧2/[H2]×[X2] =(0.6)∧2/(0.2)×[H2]
[H2] = 0.36/(24.4×0.2) = 0.07377 mole