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1) That looks right. 2) Step 1: Moles=Mass/Mr, so it's 144/72= 2mol. Step 2: Stoichiometry means the ratio of oxygen to pentane is 1:8 so moles of oxygen is moles of pentane times 8. 2*8=16mol of oxygen. Step 3: 16= 9.6*10^24. 3) The ratio of oxygen to carbon in CO2 is 1:2. so it's 192/3 = 64.
Best Answer: 2-butanone: CH3-C(O)-CH2-CH3 Pentane: CH3-CH2-CH2-CH2-CH3 2-butanone is significantly more polar, since oxygen carries partial negative charge and the carbon atom it is attached to is significantly positively charged.ince intermolecular interaction is strong, that leas to higher boiling point. Pentane is pretty much non-polar, so, although dipole-dipole interaction is still present in pentane, it is much-much weaker.