Question

how would you classify the black powder? element compound heterogeneous mixture homogeneous mixture

Explanation:

An element is a pure - substance that cannot be broken down into simpler substances by chemical or physical means. A compound is made up of two or more elements chemically combined. A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has a non - uniform composition. Since heating the black powder causes it to separate into an orange powder and a silver metal, it is not an element or a compound (as elements don't decompose like this and compounds decompose into elements or simpler compounds chemically). And since it separates into distinct parts, it is a heterogeneous mixture.

Answer:

B. heterogeneous mixture