91-一-10
at 500K, the ratio of the speeds of HF and HClmolecules is dominated
by their...
a)eletric dipole moments b)bond lengths c)molar masses d)molecular sizes
e)all of the above
91-二-2
for a second-order reaction A=>B+C, it takes 3 min for the concentration
of A drops to its original value [A]o = 0.02mole/L
a) the rate constant is _____
b) the time required for the concentration of A decrease from [A]o to
[A]o/4 is _____ min.
90-二-2
the Kf for the complex ion Ag(NH3)2 is 1.7*10^7. the Ksp for AgCl is
1.6*10^(-10). what is the molar solubility of AgCl in 1M NH3?
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