- How would an aqueous solution of sodium carbonate be made?

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Bag w/ 2 red, 5 orange, 3 purple, 2 green, & 3 yellow. 2 selected w/out replacement. What prob. of selecting exactly 1 red and 1 purple? A lamina of constant density 6kg/m^2 is defined by the region x+y =<2, x>0, y>=0. Find My and Mx? A radio wave has a frequency of 5.40 × 108 Hz. What is the energy (in J) of one photon of this radiation? What is 3 to the power of negative 3? A mass of 30.0 kg sits on the London Eye whirled in a vertical circle of radius 10.0 m at a constant speed of 5.0 m/s. Neglecting air?