Which of the following is not true of polar covalent bonds? (pf)

a. polar covalent bonds exist between atoms of the same element.
b. polar covalent bonds create two poles across the bond.
c. polar covalent bonds result from the unequal sharing of electrons.
d. electronegativity differences for atoms with polar covalent bonds range between 0.5 and 2.0

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

What is the percent by mass of magnesium sulfate in mgso4.7h2o

Which elements are found in glucose, the product of photosynthesis? a. carbon, hydrogen, and oxygen b. carbon and hydrogen c. carbon, nitrogen, and oxygen d. hydrogen, nitrogen, and carbon