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10. A sample weighing 106.7 grams is analyzed and found to contain 42.97 g of potassium, 28.57 g of chromium; the remainder is oxygen. What is the empirical, or simplest, formula of this substance? 1027 11·An organic compound is analyzed and found to be 38.71 % carbon and 9.68 % hydrogen; the rest is oxygen. If the molecular weight of this substance is 62 g/mol, what is the molecular formula of this substance? 12. A sample weighing 112.2 grams is analyzed and found to contain 48.695 g of sodium, 12.701 g of carbon; the remainder is oxygen. What is the empirical, or simplest, formula of this substance?
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