15mL because if it started as 20 mL and went to 35mL when u put in pyrite, the pyrite takes up 15mL
Answer:
2?
Explanation:
Well the rocks can be thrown around or just start breaking down. Sorry if I'm not correct
Mixtures are combinations of materials that can be separated by in most cases time. For instance, oil and water is a mixture. You can tell this by placing the two chemicals in a container and shaking them. They will mix and look like one substance, however, they will separate into the two liquids after some time is given. Assuming that "pure substance" is a solution, a substance is similar to a mixture, but the materials used in the solution are not separable. Over time the materials in the containing will not separate. I believe this is the answer you are looking for.
Answer: 29.89mL of HClO4 is needed
Explanation: Please see the attachments below
