Problem based on moles
(a) How many grams of Na2SO4 are there in 15 mL of 0.50 M Na2SO4? (b) How many milliliters of 0.50 M Na2SO4 solution are needed to provide 0.038 mol of this salt?
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Suppose sin(θ) = 8/17 for θ in Quadrant II. Find the values of the other trigonometric functions of θ.
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