You have a piece of a mineral that you are trying to identify. Using other properties of the mineral, you have narrowed it down to either pyrite or pyrrhotite. You know that pyrrhotite is weakly magnetic, but pyrite is not magnetic at all. What test could you perform to identify the mineral? PLS help Ill GIvE BrAINELiesT AND
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14 days is the half-life of phosphorus-32

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

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a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.