When writing chemical equations, the coefficient is distributed to each element in the (1) not just the first element. The coefficient also goes in front of the entire compound. If a subscript is located within the compound, the subscript is (2) by the coefficient to determine the number of atoms of that element. Examine the formula: N2 + H2 ⇒ NH3. When balancing this equation, the reactant side has (3) nitrogen atoms, while the product side has (4) nitrogen atom. To balance the nitrogen atoms, a coefficient of 2 is placed in front of the compound (5) . The number of hydrogen atoms in the product is now equal to 2x3, or the coefficient times the (6) . The hydrogen atoms on the reactant and product sides are not (7) . To balance them, a (8) must be placed in front of the H2. Now the equation is balanced. Options:
(1) - Balanced, Compound, Subscript
(2) - Subscript, Balanced, Compound, Multiplied
(3) - 2, 1, 3, N2
(4) - 3, H2, 2, 1
(5) - N2, NH3, H2, 2
(6) - Subscript, Compound, Balanced, Multiplied
(7) - Subscript, Compound, Balanced, Multiplied
(8) - 2, 1, H2, 3

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).

catya your not at all which answer i've seen you do this on another question!

yes the answer is total mass in unchanged   : )