NSTSE · Atoms and Molecules · Quiz
5 real NSTSE questions on Atoms and Molecules. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.
Question 1 of 2
MEDIUMHow many moles of calcium carbonate (CaCO₃) are present in 25 g of it? (Given: Ca=40, C=12, O=16)