Oh, that STP and moles question always ties my brain in knots! To convert grams to litres at STP, you must first find the number of moles by dividing the given mass by the gram molecular mass, then multiply those moles by 22.4 litres. Honestly, I just memorised that last part like a nursery rhyme, hoping it sticks in the exam. It reminds me of trying to explain a cloud's shape to my students—I can describe the steps, but the 'why' feels as distant as the pahad in summer haze.
#exams#study
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