What are external costs? a. costs that are important in the production of goods but not always considered b. costs that form part of a product’s price c. costs that only consider labor efforts d. costs that have an impact on the environment e. costs that consists of raw materials and fixed assets

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

If 200.0g of copper(ll) sulfate react with an excess of zinc metal, what is the theoretical yield of copper

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.