18) List the phases of water in order, from the phase with the slowest molecular movement to the phase with the fastest molecular movement.

A)
Gas-Liquid-Solid
B)
Liquid-Solid-Gas
C)
Solid-Liquid-Gas
D)
Gas-Solid-Liquid

Solid--Liquid--Gas

Explanation:

A Solid substance has its molecular particles closely packed so molecular movement is very slow

A liquid substance has freer molecular particles than a solid substance so molecular movement is moderate

A gas substance has its molecular particles scattered so it's molecular movement is the fastest of the three.

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