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Sagot :
Answer:
C6H12O6
Explanation:
Had the same question and it said it was the right answer :)
Answer:
C6 H12 O6
Explanation:
Find the percent composition of the elements:
20.00 / 50.00 × 100% = 40.00% carbon
3.36 / 50.00 × 100% = 6.72% hydrogen
26.64 / 50.00 × 100% = 53.28% oxygen
From the periodic table, the molar masses of carbon, hydrogen, and oxygen are 12.011 g/mol, 1.008 g/mol and 15.999 g/mol, respectively.
Next, divide the element’s percentage-based mass by its molar mass to get a ratio of moles:
40.00 / 12.011 = 3.33 moles of carbon
6.72 / 1.008= 6.67 moles of hydrogen
53.28 / 15.999 = 3.33 moles of oxygen
Divide each result by the lowest number of moles to obtain a 1 : x ratio:
3.33 / 3.33 = 1 mole of carbon
6.67 / 3.33 ≈ 2 moles of hydrogen
3.33 / 3.33= 1 mole of oxygen
Since each result is a whole number, the empirical formula is CH2O.
The empirical formula weight is
(1 × 12.011 grams/mole) + (2 × 1.008 grams/mole) + (1 × 15.999 grams/mole) = 30.026 grams/mole.
To find the molecular formula, divide the molecular weight by the empirical weight:
180.156 / 30.026 = 6.
So, the molecular formula has 6 times the number of each element as the empirical formula.
The molecular formula is C6 H12 O6 :)
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