8. Pb(NO3)2 +2KI 2K(NO3) + Pb12 What type of chemical reaction is taking place in this chemical equation? *
Synthesis
Decomposition
Single Replacement
Double Replacement
Combustion

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

257 grams h2o i think

Answer the molar mass of magnesium is 24.305g/mol.

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m