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Which one of the following statements is NOT correct?
Half mole of nitrogen gas is measured 11.2 litre at STP
17 gram of ammonia gas contains 6.022 × 10²³ molecules at STP
22.4 litre of CO2 gas at STP contains 44 gram of molecules
4 gram of hydrogen gas contains 6.022 × 10²³ molecules
Explanation:
(a) True: 1 mol gas at STP = 22.4 L ⇒ 0.5 mol = 11.2 L.
(b) True: Molar mass of NH3 = 17 g/mol ⇒ 17 g = 1 mol ⇒ 6.022 × 10²³ molecules.
(c) True: 22.4 L CO2 = 1 mol ⇒ mass = 44 g.
(d) False: H2 molar mass = 2 g/mol ⇒ 4 g = 2 mol ⇒ 1.204 × 10²4 molecules (not 6.022 × 10²³).
By: Heena ProfileResourcesReport error
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