All of the following statements are true about a pure substance, except it is a single kind of matter.

it can be easily separated physically.

it can be an element or a compound.

it has a specific makeup or composition.

How many moles of bromine are needed to produce 3.23 moles of potassium bromide

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 empirical formula of a compound that is 50.7% antimony and 49.3% selenium ?