PLEASE HELP Which of the following compounds would have the lowest melting point?
1) sodium chloride
2) potassium chloride
3) dihydrogen monoxide
4) aluminum oxide

Which of these compounds will require a roman numeral?
1) Al₂O₃
2) CaSO₃
3) MnSO₃
4) BaO

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

c

explanation: