Anhydrous copper(II) sulfate can be made by heating hydrated copper(II) sulfate. CuSO4.5H2O → CuSO4 + 5H20
What can be added to anhydrous copper(II) sulfate to turn it into hydrated copper(II) sulfate?
A
concentrated sulfuric acid
B
sodium hydroxide powder
с
sulfur dioxide
D
water

the food using pesticides in the future will harm you by giving you diseases like cancer or something since they have things that we should not eat in it like chemicals or pesticides. that is why organic food is more expensive because they take the time to make it right and healthy for you to eat.

explanation:

you need to stop taking that class

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.