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1 mol (at STP) = ? L
22.4 L = 1 mol of gas
(PV=nRT) What is the value of R?
Determining ionic character
The compound with the greatest difference in electronegativities between the metal and nonmetal has the most ionic character. Electronegativities tend to decrease down a group of the periodic table.
Precession is the spin of protons, electrons, and neutrons in an atom. For a nonzero precession in the nucleus of an atom, you have to have an uneven number of nucleons.
Determining moles of a substance
Determining number of ions
moles x Avogadro (6.02e
) = # ions
Litmus paper color changes
Blue in base
Red in acid
No color change either means it is in the opposite solution, or that the solution is neutral.
What cells in the body do not contain DNA?
Difference between nucleotide and nucleoside:
Nucleotides have phosphate groups and nucleosides do not.