What i'm English i do not know what are you talking about
AB----> A + B
rate= k(ab)^2
by use of integrated second order rate law
1(/Ab)t = 1/AB)0 + Kt
t= time
k=constant
(AB)0 =initial concentration
(AB)t= final concetration
1/(ab)t= 1/1.5 + 0.20 x12.9 = 3.35
1/(ab)t = 3.25 multiply both side by ( ab)t
1= 3.25(ab)t divide both side by 3.25
(ab)t is therefore=0.308
None of the given statements are completely true.
<u>Explanation</u>:
Family or groups in "periodic table" are 18 in number which represents column in table. As we go down in a family or group in the "periodic table"-the atom size become bigger and bigger. Non-Metals are less reactive which mostly lie in p-block. "Metals" are ""ore reactive" in "s-block". The atom’s valence electrons remain same for example when we go down in alkali metals in s-block the valence electron is one only and in alkaline earth metals its two only.
There are many simple ways to prevent erosion. One of the simplest forms of preventing erosion is with vegetation and by establishing root systems that hold the soil together. You can also use geotextiles, fertilizers and also build retainer walls to keep the soil intact and prevent erosion.