The physical properties of 10 grams of iron are the same as the properties of 20 grams of iron.

Can someone me with 6 to 10 plz this is for masteries test.

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.

At element makes up all organic compounds?