Which of the following formulas contain the same number of oxygen atoms? Mg(NO2
NH. NO
Ca(CIOU
IV
Nacioz
V
CONO2
O A Formulas I and II
OB. Formulas II and IV
o C. Formulas I, II, and III
OD. Formulas I, II, and IV

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

i wish i could but this one is weird give me abc and i can solve it.