- Which city has better living standards: Pyongyang or Hong Kong?

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Given: G= 6.672 x 10e^ -11 Nm^2/kg^2
Io, a satellite of Jupiter, has an orbital radius of 4.48 x 10^5 km. Determine Jupiter s mass in kg.? What mass of Al2O3 is produced when 81g of Al undergoes complete combustion (with workings please)? Find the energy of the photon required to excite a hydrogen atom from the n=1 state to the n=5 state.? 60.61 g of CuNO3 is dissolved in water to make a 0.200 M solution. What is the volume of the solution in liters? One and a half billion divided by 30 million?