Atoms release energy when_

A. electrons move to a lower energy level

B. electrons move to a higher energy level

c. protons move to a higher energy level

D. protons move to a lower energy level

What us halfway between 7.5 and 10

The percent yield for a chemical reaction can not be calculated until the reaction is completed True False

How does the temperature of absolute zero relate to the kinetic energy of a substance's molecules? A. The molecules begin to group together B. The molecules are moving very slowly C. The molecules stop moving entirely D.

Products that are poisonous to you and pets are known as: A) flammables. B) reactives. C) toxins. D) corrosives

How many moles of solute are contained in 200 milliliters of a 1 M solution? (1) 1 (3) 0.8 (2) 0.2 (4) 200

chromium can combine with chlorine to from corneum chloride which equation is a correct representation of this reaction

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