How many grams of bromine are required to react completely with 37.4 grams aluminum chloride?
alcl3 + br2 → albr3 + cl2

None  

Explanation:

Cl₂ is above Br₂ in the activity series.

Bromine will not displace chlorine from its salts.

The reaction will not occur.

The balanced chemical equation is

The conversions are  

mass to moles to moles to mass

To convert mass to moles we divide the mass by molar mass which is

To convert moles to moles we make use of mole ratio 2 : 3

To convert moles to mass  we multiply by molar mass which is

=67.2g  is required (Answer).

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

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