The heat of fusion DeltaHf of ethyl acetate (C4H8O2) is 10.5 kJ/mol. Calculate the change in entropy DeltaS when 43. g of ethyl acetate freezes at - 84.0 °C. Be sure your answer contains a unit symbol. Round your answer to 2 significant digits.

h let me think

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.