type ethanol 2. A student determined that ethanol contains only C, H and O. He f
ID: 1041318 • Letter: T
Question
type
ethanol 2. A student determined that ethanol contains only C, H and O. He found that 11.5 grams of irical formula of contains 6.00 grams of carbon and 1.51 grams of hydrogen. What is the emp ethanol? A compound was analyzed and has been found to have the following composition: copper 66.75%, phosphorus 10.84%, and oxygen 22.41%. Determine the empirical formula of the compound. 3. proximate molar mass of 165 to 170 g has the following percentage A compound having an composition by mass: carbon, Determine the empirical formula and the 4. molar . 42.87% ,hydrogen 3.598%, ygen 28,55%and nitrogen 25.00%. molecular formula of the compound.Explanation / Answer
Q2) ethanol
percentage of carbon in ethanol = mass of Cx100/ mass of ethanol
= 6x100/11.5
= 52.1739%
percentage of hydrogen = mass of H /x100/ mass of ethanol
=1.51 x100/11.5
= 13.13
Thus % of O = 100-[%C +%H]
=100-[52.1739+13.13] =34.69
ratio of atoms 2 6 1
Thus the empirical formula of ethanol is C2H6O
Q3)
thus the empirical formula is Cu3PO4
element carbon hydrogen oxygen percentage 52.17 13.13 34.69 atomic mass 12 1 16 moles of atoms 4.35 13.13 2.17Related Questions
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