2. What is true about the position of all metals in the periodic table?
A. They are in the first group.
B. They are in the bottom period.
C. They are in the rightmost column.
D. They are to the left of the zigzag line.

D they are to the left of the zigzag line.

Explanation:

The first group are alkali metals and therefore wrong. The zigzag line is composed of semimetals and to the left we have metals like magnisum and metals are always bottom right in the table.

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

b.

the accuracy of the data.