The ΔH° for the decomposition of Cl2 into Cl atoms is 121.7 kJ/mol. Cl2 → 2Cl

What is the longest wavelength of light that could dissociate chlorine in this manner? If you like, you can use h = 6.626 × 10-34 and c = 3 × 108. Report your answer in nm to 3 significant figures. If you want to use scientific notation, use the format of 6.022E23 for 6.022 x 1023.

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

the dissolution of polymer can be thermodynamically described in 2 steps.