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What is the heat of formation of ethane, C2H6 ? How many grams of NH3 can be produced from 2.15 mol of N2 and excess H2? Why is that rate of kerosine evaporation is higher than water? The emission of mercury shows a line of wavelength 579 nm. how much energy is emitted as the excited electron falls to a lower level? Given: The coordinates of rectangle DEFG are D(0, b), E(a, b), F(a, 0), and G(0, 0). Prove: The diagonals of a rectangle are congruent.As...?