Which reaction below represents a balanced, double replacement chemical reaction?
a) c2h5oh + 3o2 → 2co2 + 3h2o
b) rb2o + cu(c2h3o2)2 → 2rbc2h3o2 + cuo
c) 2al + 3h2so4 → 3h2 + al2(so4)3
d) 2h2o → 2h2 + o2

Amines are good nucleophiles, even though they are neutral molecules. how would the rate of an sn2 reaction between an amine and an alkyl halide be affected if the polarity of the solvent is increased? amines are good nucleophiles, even though they are neutral molecules. how would the rate of an reaction between an amine and an alkyl halide be affected if the polarity of the solvent is increased? because both reactants in the rate-limiting step are neutral, the reaction will be faster if the polarity of the solvent is increased. because both reactants in the rate-limiting step are neutral, the reaction will be slower if the polarity of the solvent is increased. because both reactants in the rate-limiting step are neutral, the reaction will occur at the same rate if the polarity of the solvent is increased. request answer

The density of benzene at 15 °c is 0.8787 g/ml. calculate the mass of 0.1500 l of benzene at this temperature. enter your answer in terms of grams

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!