Calculate the enthalpy of combustion for propane under three different conditions: (a) complete combustion with the theoretical amount of air (i. e. stoichiometric); (b) complete combustion with 20% excess air; (c) incomplete combustion with 20% excess air, where 90% (vol.) of the propane is consumed and the unburned portion remains in the products.

Why are people not able to skip a dive to the deepest part of the ocean

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.

15. what volume of cci, (d = 1.6 g/cc) contain6.02 x 1025 cci, molecules (ci = 35.5)(1) 10.5 l(2) 250 ml(3) 9.625 l(4) 1.712 lplz answer with step by step explanation