The labels on a shipment of the five chemicals a –e below were washed off by accident when the delivery truck went through a truckwash with the doors open. a clever student took infrared spectra of each of the resulting unknowns. unknown #1 had a strong, broad ir absorption at 3400–3600 cm–1, and no absorptions between 1600 and 2900 cm–1. unknown #2 had a strong absorption at 1680 cm–1 and no absorptions above 3100 cm–1. what are the structures of unknowns 1 and 2?

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.

the answer is 0.42 is that is an option. this question provides no info