draw the structure of the conjugated diene that will react with one equivalent of hbr to yield a racemic mixture of 3-bromocyclohexene.

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.