I really need help with this, please make sure the answer is correct.
NH3(g)+H2O(I)>NH4+(aq)+OH-(aq) NaOH(s) H2O(I) > Na+(aq)+OH-(aq)
The equations above show two bases reacting with water. Which of these is the major characteristic of bases?

a) They contain many sodium atoms.

b) They release protons.

c) They are gases

d) form OH– ions in solution.

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Agas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kpa to a final volume of 0.065 m^3 while its temperature is kept constant. how much work is done by the system?

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.