Question

What mass of NaOH is required to absorb whole CO2 produced? [Ans: (a) Fe2O)(b) 0.133 mol (c) 0.1875 mol (d) 15 g of NaOH] (a) What volume of oxygen will be produced by heating 245 kg of pure KCIO: at STP.
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Answer 1

Answer:

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Explanation:

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Answer 2

80 g of NaOH

67.2 L of O₂

Explanation:

Balanced reaction:

2NaOH + CO₂ → Na₂CO₃ + H₂O

2 moles of NaOH are required to absorb the whole CO₂.

1 mole = 40 g of NaOH

2 mole = 80 g of NaOH

2) 2KClO₃ + 2KCl → 3O₂

Volume of Oxygen = moles of Oxygen × 22.4

                                = 3 × 22.4 = 67.2 L of Oxygen

245 g of KClO₃ gives 67.2 L of O₂ at STP.