Identify the following as physical (P) or chemical (C) changes. 1. NaCl (Table Salt) dissolves in water.
2. Milk sours.
3. Ag (Silver) tarnishes.
4. Sugar dissolves in water.
5. Wood rots.
6. Heat changes H2O to steam.
7. Baking soda reacts to vinegar.
8. Iron (Fe) rusts

Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump

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.

The diagram below shows the movement of particles. what does this piece of evidence best support? the collision theory the maxwell-boltzmann distribution the effect of pressure on reaction rates the effect of temperature on reaction rates