A line shows a bonding pair of electrons (which are usually 2 for every line) – the atoms involved in the bond share two electrons per bond to form a covalent bond. The two dots show a pair of lone electrons NOT involved in bonding.
The Carbon and Sulfur will require to have their valence orbital shell involved in the bonding to have 8 electrons. The Hydrogens need 2 to achieve stable electron configuration. This way the atoms achieve stability in the molecule
Answer is: volume will be 6,7 L. Boyle's Law: the pressure volume law - <span> volume of a given amount of gas held varies inversely with the applied pressure when the temperature and mass are constant. p</span>₁V₁ = p₂V₂. 90 kPa · 5 L = 67 kPa · V₂. V₂ = 90 kPa · 5 L / 67 kPa. V₂ = 6,7 L, but same amount of oxygen.