A 2.5 L flask contains a mixture f nitrogen gas and oxygen gas at 25°C. The total pressure of the gaseous mixture is
95 atm, and the mixture is known to contain 0.040 mol N2.
Calculate the partial pressure of oxygen and the moles of oxygen present

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c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.