Why are the spheres representing nitrogen and oxygen different colors

What is the difference between physical and chemical change?

Which of the following examples is a sign that a chemical change is occurring? A. the substance seems to have disappeared B. the state of the matter has changed C. the production of heat, light, and smoke

Which of these is a property of acid? A. They Taste Sour B. They Turn Litmus Paper Blue C. They Typically Cantain AN - Oh group D. They Feel Slipperey

Chloroform was used as an anesthetic for childbirth and surgery during the nineteenth century. Write the molecular formula of chloroform.

If you had 40 molecules of co gas in 250000 molecules of air, what is the concentration of co in parts per million?

How do I write a balanced half-reaction describing the reduction of gaseous dioxygen to aqueous oxide anions?

When table salt is placed in water and stirred it dissolves and a clear liquid is obtained. This process is a

Carbonic acid is generated by bubbling co2 into a beaker of water. If it took 5 minutes for this reaction to reach equilibrium, how would the results differ if the enzyme carbonic anhydrase was added to the beaker of water?

Part a which element can expand its valence shell to accommodate more than eight electrons? which element can expand its valence shell to accommodate more than eight electrons? he h f b s

What are some reasons why the research should be put through a peer-review process?