- What is (-8/3) - 7/2 + 7/10?

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What is the equation of the line that passes through the points (-3, 1) and (-5, 7) ? Molar mass of Radon if mercury vapor diffuses 1.082 times as fast as radon gas? Assume that Graham's law holds for diffusion.? Calculate the frequency when an electron drops from n = 5 to the n = 4 level in a hydrogen atom. Give your answer to three sig figs.? Solve each of the systems below using augmented matrices and back-solution
method: x – 2y + z = -1 2x + y – 3z = 3 3x + 2y – 3z = 7? What is the chemical formula for barium chloride enneahydrate?