Each AlCl₃ gives 4 ions. Therefore, 0.5 × 4 = 2 moles of ions. Number of ions = 2 × 6.022 × 10²³ = 1.2044 × 10²⁴.
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A sample of a pure gas has a mass of 1.25 g and occupies a volume of 1 dm³ at STP. The molar mass of this gas is
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In the reaction 2SO₂ + O₂ → 2SO₃, the volume of sulfur trioxide produced at STP when 44.8 dm³ of sulfur dioxide reacts completely is
