Which statement about entropy is true? o non-spontaneous reactions sometimes will happen all by themselves. o entropy stops when pure substances are in solid state the entropy of the universe is increasing. o during a change of state there is no change in entropy.

Explanation:

Entropy stops when pure substances are in solid state: false. The entropy is 0 when the temperature is 0K, not by the solid state.The entropy of the universe is increasing. true. The second law of thermodynamics says: The level of disorder in the universe is steadily increasing.During a change of state there is no change in entropy. false. A change of state occurs with a change of the energy of the system and a change of energy always will change the entropy of the systemNon-spontaneous reactions sometimes will happen all by themselves false. Non-spontaneous reactions never occurs by themselves. Also, this have no immediate relation between non-spontaneous reactions and entropy. Also you have to study the enthalpy of the process.

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Cr(oh)3 -> cr(3+) + 3oh-

Determine the  wavelength of light emitted when an electron  in an li2+ ion  makes a transition from an orbital with n  =  6 to an orbital with n  = 5.