How many moles of iodomethane are consumed in the following conversion?

$$\mathrm{CH}_3 \mathrm{NH}_2 \xrightarrow[\Delta]{\mathrm{CH}_3 \mathrm{l}}\left(\mathrm{CH}_3\right)_4 \mathrm{~N}^{+} \mathrm{I}^{-}$$

Calculate the time required for reactant to decrease the concentration from $100 \%$ to $20 \%$, if rate constant of first order reaction is 0.02303 hours $^{-1}$.

Identify the number of donor atoms in EDTA molecule that form coordinate bond with central metal atom or ion in a complex.

Which from following gases of same mass exerts highest pressure at constant temperature?