Applying the bohr model to a triply ionized beryllium atom (be3+,z=4), find the ionization energy required to remove the final electron in be3+.

0.09 moles of sodium sulfate in 12 ml of solution

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.