Which of the following was one of many important factors in encouraging the expeditions of the late fifteenth century?

In the Habsburg-Valois wars of the sixteenth century, why did the Catholic French kings support the Lutheran German princes?

For Luther, what did “freedom” mean?

What right did France win from the papacy in 1516?

What did Cortés do upon reaching the city of Tenochtitlan?

Where did Columbus first land in the Americas?

What was the central food crop in the high altitude of the Andes?

Nitric acid, HNO3, was first prepared 1200 years ago by heating naturally occurring sodium nitrate (called saltpeter) with sulfuric acid to produce sodium bisulfate and collecting the vapors of HNO3 produced.  Calculate ∆H°rxn for this reaction.  ∆H°f[NaNO3(s)] = -467.8 kJ/mol; ∆H°f[NaHSO4(s)] = -1125.5 kJ/mol; ∆H°f[H2SO4(l)] = -814.0 kJ/mol; ∆H°f[HNO3(g)] = -135.1 kJ/mol.NaNO3(s)  +  H2SO4(l)  =>   NaHSO4(s) + HNO3(g)

Using the information below, calculate ∆Hf° for PbO(s)               PbO(s) + CO(g) –> Pb(s) + CO2(g)     ∆H° = –131.4 kJ                                                                            ∆Hf° for CO2(g) = –393.5 kJ/mol                                                                            ∆Hf° for CO(g) = –110.5 kJ/mol

What happened after the Maya abandoned their cultural and ceremonial centers?