The element of 2.345

Which of the following indicates that an exothermic reaction has taken place? A. a change in color B. release of heat and/or light energy C. cooling of the surroundings D. absorption of heat by the reaction ... ?

How do glaciers cause erosion and deposition

What is the best definition of energy? A) the capacity to expert strength. B) the capacity to measure mass C) the capacity to do work D) the capacity to measure heat

When a substance changes from any state of matter to another it is called?

Who further developed Democritus's early contributions to the atomic theory by proposing that each chemical element has its own kind of atom?

What is the atomic weight of a hypothetical element consisting of two isotopes, one with mass = 64.23 amu (26.0%), and one with mass = 65.32 amu? (a) 65.3 amu (b) 64.4 amu (c) 64.9 amu (d) 65.0 amu (e) 64.8 amu

Is this base a physical or chemical property?

Classify each of the following aqueous solutions as a nonelectrolyte, weak electrolyte, or strong electrolyte. a) LiClO4 b) HClO c) CH3CH2CH2OH d) HClO3 e) CuSO4 f) C12H22O11

Give examples of temporaty physical change

Which of these is a source of sediment? A. Fragments of other rocks B. Chemicals and Minerals dissolve in water C. Sea shells D. All of the above