Name each compound.

Ionic Compounds:
(a) BaCl2
(b) Na20
(c) K(MnO4)
(d) Sb(NO3)4
(e) Os(PO3)

Covalent Compounds
(f) CH4
(g) NO2
(h) Br2
(i) CF4
(1) OS2

Explanation:

Ionic compound:

a) Barium Cloride

b) Sodium Oxide

c) Pottassuim Manganate

d) Tin Nitrate

e) Sodium Phosphate

Covalent compound:

a) methane

b) nitrogen dioxide

c) diatomic bromine

d) carbon tetrafluroid

e) disulful monoxide

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

answer seismograph;