An __ is pure substance that cant be broken down into simpler substance by chemical or physical means

Express the following number in scientific notation. 0.026890 =

Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.