Passage: Originally made from ground deer horn and called hartshorn. Today it is called Baker's Ammonia. The ingredient ammonium carbonate is a mix of ammonium bicarbonate (NH4HCO3) and ammonium carbamate (NH2COONH4). It is prepared by the sublimation of a mixture of ammonium sulfate and calcium carbonate and occurs as a white powder or a hard, white or translucent mass. It acts as a heat activated leavening agent and breaks down into carbon dioxide (leavening), ammonia (which needs to dissipate) and water. It is sometimes combined with sodium bicarbonate to mimic as a double acting baking powder and to help mask any ammonia smell not baked out.

Question: What aree? two components of ammonium carbonat
ammonium bicarbonate (NH4HCO3) and ammonium carbamate (NH2COONH4).