The solubility of aluminum hydroxide in water when dilute nitric acid is added to it. (a)

The equilibrium equation representing the solubility of aluminum hydroxide is,

When dilute nitric acid is added to it, it would neutralize with hydroxide ions present on the right side of the above equilibrium. So, the concentration of hydroxide ions decreases up on the addition of dilute nitric acid to the aluminum hydroxide solution. This causes the above equilibrium to shift towards the products (right hand side) resulting in the dissolution of more aluminum hydroxide. So. the solubility of aluminum hydroxide in water increases, when dilute nitric acid is added to it

i'm pretty sure it is letter c.) car

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).