A. A wood splint was soaked in the unknown solution for 5 mins and the splint was placed in the flame of a Bunsen burner. The flame was orange.
b. AgNO3 was added to the unknown and a white precipitate resulted. Upon addition of thiosulfate, the precipitate dissolved.
c. Oxalate was added to the unknown and a precipitate formed. The precipitate dissolved with 8 drops of HNO3.
d. Addition of hydroxide produced a cloudy solution.
e. Upon reaction with sulfate, a white precipitate formed.
f. Upon reaction with ferrocyanide, a precipitate formed.
g. Fe(salicylate) was added to the known and a brown/light red precipitate formed.
h. Addition with Ba(NO3)2 gave no reaction.

the answer is 303.15 or 303

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).

it is stable as it is in group 0 which have full outer shells of electrons