Which are the Isotones from the following nuclei
`_7N^14, _6C^12, _8O^15, _8O^16`

Calculate the heat of formation of benzene from the following data. C(s)+O_2(g)rarrCO_2(g)triangleH=-393.5kJ C_6H_6(l)+15/2O_2(g)rarr6CO_2(g)+3H_2O(l) triangleH=-3267.7kJ H_2(g)+1/2O_2(g)rarrH_2O(l)triangleH=-286.2kJ

When CO_2 dissolves in water the following equilibrium is established, CO_2 + 2H_2O hArr H_3O^+ HCO_3^- for which the equilibrium constant is 3.8 xx 10^(-7) and PH =6.0 The ratio of [HCO_3]/[CO_2^-] IS :

Fill up the gaps in the following equations : Cr_2O_7^(2-) +8H^+ +3NO_2^- rarr2Cr^3^+ +…….+……...

Evaluate the following : [[11,23,31],[12,19,14],[6,9,7]]