Chemistry · Unit 1 · Chemical reactions — reactants, products and energy change · Chemical reactions
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A student has 0.25 mol of calcium carbonate, CaCO₃. Which statement correctly explains the relationship between mass, moles and molar mass that allows the student to determine the mass of the sample?
A student has \(12.0\) g of carbon-12 (\(^{12}\text{C}\)) and wants to understand how the mole concept relates the mass to the number of moles. Explain which statement correctly describes this relationship.
A student has a sample containing \(0.250\) mol of sodium chloride (\(\mathrm{NaCl}\)). Explain how the number of moles, the mass, and the molar mass of \(\mathrm{NaCl}\) are related in this sample.