8. The gravitational field strength on the moon is 1.63 N/kg. If a rock on the moon weighs 2000N, what is the mass of the rock? Show your work.

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In a particular chemical reaction, the energy of the reactants is 30 kj and the energy of the products is 5 kj. 
 the maximum energy of the system is 40 kj. sketch a potential energy diagram for this reaction. make sure to label the energy of the reactants, the energy of the products, the activation energy, and the enthalpy change for the reaction.