HELPPP 12. A researcher uses several procedures to separate a rock sample into different
chemicals. A mass of 50 grams of one chemical is produced. If this chemical cannot be
separated into other chemicals, then it is best described as
A. a compound.
B. a mixture.
C. a solution.
D. an element.

If a chemical can no longer be separated into other chemicals, it can be said that it is d. an element. This is because elements are the purest substances out there. Rocks are mixtures that are made of inerts and various minerals which are compounds. Compounds are then composed of elements.

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.