How much energy is released when 0.40 mol c6h6(g) completely reacts with oxygen? 2c6h6(g) + 15o2(g) 12co2(g) + 6h2o(g) kj

-1268 kJ

Explanation:

The molar enthalpy of combustion of C6H6 is -3170 kJ/mol

2C6H6(g) + 15O2(g) → 12CO2(g) + 6H2O(g)

Therefore;

when 1 mole of C6H6 undergoes combustion, an energy of -3170 kJ/mol is released.

Therefore; for 0.40 mole

= 0.4 × -3170 kJ

= -1268 kJ

The guy above me is correct, but the next answers are -67.68 and exothermic

Explanation: edge

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.