Use the information provided to determine δh°rxn for the following reaction: δh°f (kj/mol) 3 fe2o3(s) + co(g) → 2 fe3o4(s) + co2(g) δh°rxn = ? fe2o3(s) -824 fe3o4(s) -1118 co(g) -111 co2(g) -394

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table? atom p has an estimated zeff of 7 and is therefore to the left of atom q, which has a zeff of 6. atom p has an estimated zeff of 7 and is therefore to the right of atom q, which has a zeff of 6. atom p has an estimated zeff of 5 and is therefore below atom q, which has a zeff of 4. atom p has an estimated zeff of 5 and is therefore above atom q, which has a zeff of 4.