Discover Questions

Explain why the names intrusive and extrusive are appropriate for the two types of igneous rocks.? What is the average lifespan for a human? What is the freezing point of an aqueous solution that boils at 105.0 degrees C? Enthalpy change for the first reaction?
P4 + 6Cl2 → 4PCl3 ΔH = P4 + 10Cl2(g) → 4PCl5(s) ΔH = -1,777.5
PCl3(l) + Cl2 → PCl5(s) ΔH = -127.2? How many negative roots does the equation 3x^4 - 2x^3 + 8x^2 - x- 7 = 0 have?