Needed answered by the end of the day how would a scientist go about determining if an unknown substance is an element, compound, solution, or heterogeneous mixture? it's recommended that you define each and provide an example along with your definitions.

each of more than one hundred substances that cannot be chemically inter converted or broken down into simpler substances and are primary constituents of matter. Each element is distinguished by its atomic number, i.e., the number of protons in the nuclei of its atoms. thats part of one.Theoretically speaking, for a scientist to determain weather an unknown substance is set out to be an element, compound, solution, or heterogenous mixture is they would have to look at the substances properties, and appearance, using this will allow the scientist to outlook what it shall be.

mabye he would study it. i honestly dont know.

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them