Acetonitrile (ch3cn) is an important industrial cheical. among other things, it is used to make plastic moldings, which have multiple uses, from car parts to lego bricks. which statement below about acetonitrile is false? a. acetonitrile has 16 valence electrons in its lewis structure. b. acetonitrile has one triple bond. c. acetonitrile has one pair of nonbonding electrons. d. all atoms satisfy the octet rule in acetonitrile. e. one carbon atom and the nitrogen atom have nonzero formal charges.

E. There is no formal charge on acetonitrile

Explanation:

All the options may be checked if we draw the structure of the compound.

H₃C - C ≡ N°° , (°°) represents a pair of non bonded electrons

From this structure we can clearly see that Acetonitrile has one triple bond, that it has one pair of non- bonding electron, furthermore all atoms satisfy the octet rule. To  check for valence electrons, simply use the equation

Valence Shell electrons = Valence electrons of Carbon x Number of Carbon atoms + Valence electrons of Hydrogen x Multiplied by Number of Hydrogen + Valence electrons of Nitrogen x Number of Nitrogen

Valence Shell electrons = 4 x 2 + 1 x 3 + 5 x 1 = 16 e⁻s

The formal charge is calculated by No. of valence electron on atom - [non bonded electrons + no. of bonds]

Hence

the formal charge on carbon = 4 - (0 + 4) = 0

the formal charge on nitrogen = 5 - (2 + 3) = 0

Hence the formal charges are zero and the statement is false.

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).

a