Which of the following statements accurately describes the structure of the atom? Select one:
a. The protons are located in the nucleus and the electrons and neutrons are located outside the nucleus.
b. The protons and neutrons are located in the nucleus and the electrons are located outside the nucleus.
c. The electrons are located in the nucleus and the protons and neutrons are located outside the nucleus.
d. Protons, neutrons, and electrons are all located in the nucleus.

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