According to the following electron structure, how many valence electrons does carbon have? C = 1s22s22p2

Atom A has 32 protons and 35 neutrons. atom B has 32 protons and 33 neutrons. are they isotopes?

Stars are an example of what type of matter? gas solid liquid plasma

Which monomers make up carbohydrates? A: amino acids B: monosaccharides C: triglycerides D: nucleotides

Calculate the number of moles in the 2.1-L volume of air in the lungs of the average person. Note that the air is at 37.0ºC (body temperature). Use standard atmospheric pressure.

Why does barium and iodine form Bal2

If you have three moles of S2, how many moles of Al2S3 can be produced?

Predict whether each of the following reactions will occur in aqueous solutions. Explain your reasoning in each case. Note: Barium sulfate and silver bromide precipitate in aqueous solutions.

The digestive system is the body system that Text to speech A:A. breaks down food into substances that can be absorbed and used for energy. B:B. gets rid of the remaining solid waste that cannot be absorbed. C:C.

What kind of molecule is water? A. nonpolar B. ionic C. polar D. charged

Which of the following is not true of science? 1. Science offers proof of a claim 2. Science is a way of knowing 3. Science is a process 4. Science provides support or fails to provide support to claim