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4a) Calculate the molar concentration of a solution containing 120g of NaOH per dm3. b)Calculate the molar concentration of a solution containing 5.00g of NaOH in 250cm3. c)Calculate the mass of NaOH dissolved in 25.0cm3 of a solution of concentraion 5mol dm-3. 5) HCl(aq) + NaOH(aq) -->...

1. Yeah, I think you should retake, if you want to do it for A level. 2. Your doctors note will not boost your marks or anything like that, it's just certification showing that you didn't skive and miss the exam with intent. 3. Well, I'm not sure, depends which exam board your with, and whether...