What is EAN of metal ion in hexacyanoferrate (II) ion?

What is the total number of -OH groups present in ribonucleoside?

The rate constant of a first order reaction is $1.15 \times 10^{-3} \mathrm{~s}^{-1}$. How long will 5 g of reactant take to reduce to 3 g ?

Identify the element forming peroxide on reaction with oxygen.