What is the number of moles in 9.63 L of H2S gas at STP?
3.54 mol
0.430 mol
0.104 mol
14.7 mol

They are all full and don't need any more electrons in there outer shell.

Ibelieve it's temperature! i'm not 100% sure.

For a collision to be successful you need 2 different objects 

Answer is: value of q is 5·10⁻⁶m.chemical reaction: mg²⁺(aq) + co₃²⁻(aq) → mgco₃(s).c(mg²⁺) = 2.5·10⁻³ m; concentration of magnesium cations.c(co₃²⁻) = 2.00·10⁻³ m; concentration of carbonate anions.q = c(mg²⁺)  · c(co₃²⁻).q = 2.5·10⁻³ m  · 2.00·10⁻³ m.q = 5·10⁻⁶m.q = 0.000005 m.