Classify each of the following as an element, compound or mixture. a) Ammonia, NH 3 b) Gold bar c) Orange juice d) Wine e) Saline solution

So here we need to classify each of the following as an element, a compound, or a mixture. For the first one, we're dealing with ammonia, which has the formula NH 3. It's made up of nitrogen and 3 hydrogen atoms. It's different elements chemically bonded together, so it is a compound. Next, we have a gold bar. It's made up of pure gold, so it's a pure substance, And because it's just gold, one kind of atom, it has to be an element. Orange juice, it's made up of a liquid portion, sugar, orange concentrate, pulp. It's different things mixed together, so it's a mixture. The same can be said for wine. Wine typically has in it water, grapes, some sugar, maybe balanced out with some salt, It's different things, again, mixed together. So it is a mixture. Then finally, we have a saline solution. You see those IV bags in hospitals that are hooked up to patients? Saline solutions traditionally are made up of water and sometimes electrolytes, medication, because it's made up of different things together, mixed together, a saline solution represents a mixture. So just remember, when it comes to the classification of matter, we can group it based on its composition.