Calculate the entropy change of surrounding if 2 moles of $\mathrm{H}_2$ and 1 mole of $\mathrm{O}_2$ gas combine to form 2 moles of liquid water by releasing 525 kJ heat to surrounding at constant pressure and at 300 K .

$$ \text { Identify the bond line formula of Neopentane. } $$

What is the number of faraday required to form $1 \mathrm{~mol} \mathrm{H}_2$ by reduction of $\mathrm{H}^{+}$ions?

Identify the name of method used for three dimensional representation of molecule as follows.