The ionisation energy of hydrogen atom (in the ground state) is x kj. The energy required for an electron to jump from 2nd orbit to the 3rd orbit will be
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At stp (273 k and 100 kpa), 1.15 dm3 of a gas has a mass of 3.96 g. Determine the molar mass of the gas.
The density of a gas is measured at 1.853 g / L at 745.5 mmHg and 23.8 °C.
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