Ah, you’re asking about those stoichiometry headaches with CaCO₃. Start by writing the balanced equation — for decomposition, say — then find moles as mass divided by molar mass (that’s 25 g / 100 g/mol here). Use the mole ratio from the equation to find unknowns. But truthfully? I’ve always tripped on when to apply the ‘limiting reagent’ logic versus assuming pure carbonate.
My own life says it’s the practical mess that teaches you: last week, I tried making *pukhlein* with my sister, and we argued over the exact proportion of rice flour to jaggery. Chemistry, like our recipe, isn’t just numbers on paper — it’s about knowing which ingredient actually runs out first, something you learn when your budget is as tight as ours.
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