- Can the retention factor of an unknown substance change?

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Is there any shifting chance to mars from the earth soon? Solve for x. 3x^(1/2)-22x^(1/4)-8=0 Do you factor? If so, I'm not sure how I would factor this? If you could change or make a law up what would it be? Find the exact length of the curve.? Use VSEPR theory to predict the shape of a COCl2 molecule where C is the central atom?