A template of a Venn diagram representing common and differentiating characteristics of covalent and ionic bonds is shown. Which of the following characteristics can be written only in space B?

a)Occurs in substances that have at least one non-metal
b) Occurs in substances that have a repeating lattice structure
c) Occurs in substances that have discrete molecular structure
d) Occurs in substances that have high melting points

It ISNT occurs in substances that have discrete molecular structure

Explanation:

I took the test and got this wrong

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