Look at your lewis structure of the nitric acid above. compare thatto the structure of a nitrate ion. different sites on the nitrateion function as lewis acids and lewis bases. remember: a lewis baseis an e- pair donor. a lewis acid is an e- pair acceptor. which statements below are true for the nitrate ion? the nfunctions as a lewis acidic site, and the o's function as lewisbasic sites. the nand o's function as a lewis basic sites. the o'sfunction as a lewis acidic sites, and the n functions as a lewisbasic site. the nand o's function as a lewis acidic sites. the h1+ ion (actually solvated in water as theh3o1+ ion), willacceptelectrons, functioning as a lewis acid. acceptelectrons, functioning as a lewis base. donateelectrons, functioning as a lewis acid. donateelectrons, functioning as a lewis base. which site on the nitrate ion would the h1+ ion mostlikely have an interaction with? thenitrogen with four bonds and +1 formal charge. anyoxygen. theoxygens with a single bond and -1 formal charge. theoxygen with a double bond and no (zero) formalcharge.

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

the answer is 75.0%.