Ill give brainlists there are several different insecticides sold at your local home and garden store. they all claim to be safe for use around animals and children, but you want to be sure of this safety before you use one of the products at your own home. what would be the best way to increase the scientific reliability of these safety claims? (2 points) ask an employee of the store for her recommendation. look up results of tests conducted by environmental agencies. check for endorsements by celebrities of home-improvement shows. use the sales records to determine which product is most popular.

In order to calculate the amount of heat transferred you must know the __ and specific heat of the material, as well as the change in temperature. a. volume b. density c. mass d. enthalpy

Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas.in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point

Identify two types of chemical bonding in the source of dietary potassium