@X@user.full_name@X@ @GMU: When 10.893 g of Al reacted with an excess of oxygen, a 31.63 % yield of Al2O3 was obtained. How many grams of Al2O3 were produced?4Al(s) + 3O2(g) → 2Al2O3(s)

@X@user.full_name@X@ @GMU: How many grams of H2 must one react with a stoichiometric amount of O2 to produce -771.6 kJ?2H2(g) + O2(g) → 2H2O(g) ΔH = -484 kJ

@X@user.full_name@X@ @GMU: What is the molecular shape of SeF4?

@X@user.full_name@X@ @GMU: NO2 at 378°C decomposes to form NO and O2 according to second order kinetics (see reaction below). The half-life for this reaction was measured to be 2.56e1 s when the initial concentration of NO2 was 9.54e-3 M. What is the rate constant for this reaction?2NO2(g) → 2NO(g) + O2(g)

@X@user.full_name@X@ @GMU: What is the conjugate base and base dissociation constant of HCN if its acid dissociation constant is 4.900×10-10 ?

@X@user.full_name@X@ @GMU: Which product in the reaction below is a base (this one first in the answer) and which product is an acid?ClO-4 + HClO → HClO4 + ClO-

@X@user.full_name@X@ @GMU: How much energy in kJ is released to form one mole of 204Pb from protons, electrons, and neutrons if the nucleus has a mass of 203.973020 amu? The masses of the proton, electron and neutron are 1.00728 amu, 0.000549 amu and 1.00867 amu, respectively.

Select the organs of the immune system.  More than one answer is possible.

What is the experimental evidence that suggests that the amygdala is associated with aggression needed to maintain a dominant position in the animal’s social hierarchy? Choose the correct option.

Sound transduction occurs when