Agas at 450 k is lowing inside a 2-in. steel pipe, schedule 40. the pipe is insulated with 51 mm of lagging having a mean k 0.0623 8 a mean k - 0.0623 w/m. k. the convective heat transfer coefficient of the gas inside the pipe is 30.7 w/m2.k and the convective coefficient on the outside of the lagging is 1 w/m2.k. the air is at a temperature of 300 k. a) calculate the heat loss per unit length of 1m of pipe using resistances. b) repeat using the overall uo based on the outside area ao c) repeat using the overall u based on the inside area a. [51.58 wi (51.58 w 51.58 w

Write two balanced equations 1. dissolving of solid sodium hydroxide in water 2. the reaction of sodium hydroxide solution with hydrochloric acid

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

Will give ! what are the advantages and disadvantages of nuclear power? check all that apply. one advantage of nuclear energy is that it does not produce carbon dioxide emissions. storage of nuclear waste is a short-term problem associated with nuclear energy. the problem with uranium mining is that a large quantity of uranium must be extracted to meet energy needs because the energy release from uranium fission is so low. safe operation of a nuclear power plant can be jeopardized by a human mistake.