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What is ionisation energy?
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Use the following information: [[[[2H2(g) + O2(g) → 2H2O(l) ∆H = −572 kJ mol−1]]]] [[[[2H2(g) + O2(g) → 2H2O(g) ∆H = −484 kJ mol−1]]]] to calculate the enthalpy change for the process: H2O(g) → H2O(l)
Explain why transition metals form coloured compounds when bonded to a ligand.
Under which conditions does CH4 have the same number of molecules as 100cm^3 of O2 at 27 degrees celsius and 1.0x10^5 Pa?
Hydrogen bromide forms a strong acid when dissolved in water whereas hydrogen fluoride forms a weak acid. Distinguish between the terms strong acid and weak acid. State equations to describe the dissociation of each acid in aqueous solution. [3]
How can we determine the molecular and electron geometry of H2O?
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