Why does burned toast taste so bad? Is it a chemical or physical change?

Summarize possible ways in which phases of matter could combine to form a solution.

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

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.