Every time you add water to a solution the concentration decreases<span />
Because you are never adding more than the substances created, nor are you creating any, but should a chemical reaction take place you could see the liquid change form into a gaseous state and that would result a loss of the liquid volume.
So to wrap it all up you can’t have more liquids than what is already there but you could always lose some due to a chemical change, hence the reason it says an open flask, the chemical change would not be collected, mass would be lost
Well, because solids are..solid. When you mix things together like to make a cake, the ingredients are either very small solids that dissolve or liquids.
A, milligrams because rice is very small therefore you'd need to use a very small unit of measurement.
Answer:
May be the answer is C. Coal is being used faster than it is being produced