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07.06.2020 •
Chemistry
The number of moles of O2 in 10.6 grams of Na2CO3:
A. 0.1 moles
B. 0.3 moles
C. 0.2 moles
D. None of these
Explain please
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Ответ:
The molar mass of sodium carbonate Na2CO3 is 106g, so 10.6g is 10.6/106 = 0.1mol.
Ответ:
Explanation: Therefore the molecular formula is twice the empirical formula: C2H6O2. The compound dioxane contains only carbon, hydrogen, and oxygen. When 0.956 g dioxane is burned, 1.91 g carbon dioxide and 0.782 g water are formed. In another experiment, it was determined that 6.04x10-3 mol dioxane weighs 0.532 g.