How many molecules are present in a drop of ethanol, , of mass ? [1 mark]
a.
b.
c.
d. C2h5oh 2.3 103 g (l = 6.0 10 23 mol1)?
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Answer:
A drop of ethanol has a mass of 2.3 *10- to the power 3g.
so the molar mass of ethanol is 46.069g/mol
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