Nh4 2s h2o

Nh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2o
Nh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2o
Nh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2oNh4 2s h2o