CH₄ = 1.25 mol, O₂ = 0.625 mol. Oxygen is insufficient and is limiting.
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35. In the reaction 2Na + 2H₂O → 2NaOH + H₂, 46 g of sodium is added to 54 g of water. The mass of hydrogen gas produced is (Na = 23, O = 16, H = 1)
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37. In the reaction 2Al + Cr₂O₃ → Al₂O₃ + 2Cr, 27 g of Al and 152 g of Cr₂O₃ are mixed. The mass of chromium produced is (Al = 27, Cr = 52, O = 16)
