Which element has an atom in the ground state with a total of three valence electrons?

(1) aluminum (3) phosphorus

(2) lithium (4) scandium

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?