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8 percent yield problems. P1: 'Theoretical = 50g, Actual = 40g. Percent yield = ___%' (80). P2: 'Theoretical = 100g, Actual = 73g. Yield = ___%' (73). P3: '2H₂+O₂→2H₂O. Start: 4g H₂. Theoretical yield of H₂O = ___g. If actual = 30g, yield = ___%' (36g, 83.3%). P4: 'CaCO₃→CaO+CO₂. Start: 200g CaCO₃.

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