A gas at 300 K occupies 6.50 liters at a pressure of 355 kPa. What will its pressure be at 250 K if its volume is reduced to 4.80 liters?
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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).