Chemistry Numericals

Predict the Formula of the Ionic Compound from the Electronic Configuration
Calculation for the time taken for a first order reaction to complete to 75% (using log table)- Chemical Kinetics
How to deduce the structure of an organic compound X - Aldehydes & Ketones
What is the oxidation number of P in H3PO2 molecule?
Calculation for the number of unit cells (using log table)