Write the equations of the following synthesis reactions (assuming they can do): Synthesis of aluminum chloride
$ 2Al $ $+$ $ 3Cl_2$ $ \longrightarrow $ $ 2AlCl_3 $
Synthesis of copper(I) sulfide
$ S_8$ $ + $ $16Cu $ $ \longrightarrow $ $ 8Cu_2S $
Synthesis of ammonium bromide
$ N_2$ $ + $ $4H_2 $ $ +$ $ Br_2 $ $ \longrightarrow $ $ 2NH_4Br$
Synthesis of ammonium carbonate
$ 2C$ $ + $ $3O_2$ $ + $ $ 2N_2$ $ +$ $ 8H_2 $ $ \longrightarrow $ $2 (NH_4)_2CO_3$