The value of ΔH° for the following reaction is 3351 kJ: 2Al (s) + 3O2 (g) → 2Al2O3 (s)

The value of ΔH°f for Al2O3 (s) is kJ.

-16.43

-1676

-32.86

+1676

Name the intersection of plane bpq and plane cpq.

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

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?