The following reaction has the thermodynamic values at 298 K: ΔH° = -136.9 kJ/mol and ΔS° = -120.6 J/mol K. Calculate ΔG° at 298 K for this reaction in kJ/mol (Enter your answer to four significant figures.):

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g.  what is the percent by mass of water in the hydrate?   %

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?