Which one is a true statement about endothermic reactions?

a. energy from an outside source is continuously being added.
b. more heat is given off than is put into the reaction.
c. the reactants have less heat energy than the last products.
d. the reaction container always feels hot.

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

може ли да зареждате повече информация, моля