Which of the following would cause a physical change in a bar of steel?
a.) combining it with other substances to form new substances
b.) hammering it into a new shape
c.) putting it in water to form rust
d.) putting it in a box

An experimental procedure requires a 10 ml of acid to be dissolved

When water dissociates, each water molecule splits into a hydroxide ion and a) h 3 o + b) a hydrogen atom c) a hydrogen ion d) h 2 o e) oh —

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.