How many electrons are in the second energy level of an atom of each element?

A. Chlorine

B. Phosphorus

C. Potassium

What is the concentration (M) of average sea water if there is 0.6 mol of salt for 1 Liter of water?

What is the minimum number of nucleobase "digits" required to code for the 20 different amino acids? (Groups of nucleotides, each coding for a single amino acid in a protein chain, are called "codons" by biologists.

Carbonyl compounds can be protonated on the carbonyl oxygen. Protonation of the carbonyl oxygen gives a species whose positive charge is delocalized by resonance.

What factors are considered to be stresses on an equilibrium system?

What mass of solid Na2CO3 is required to make 250.0mL of a 0.125M solution of Na2CO3?

Describe two ways that water moves through earthy atmosphere in the water cycle.

which of the following questions can use science as a method of inquiry? a. is cloning appropriate b. how can we protect crops from drought c. why is jazz a great type of music d. did dinosaurs exist

How many moles of CO will be produced, if 32.5grams of H2O are produced? C6H6S+6O2=>6CO+3H2O+SO3

Identify and briefly describe two ecosystems in your community that are beyond schoolyard

Is N2H2 a ionic compound?