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1 mol (at STP) = ? L

22.4 L = 1 mol of gas
(PV=nRT) What is the value of R?

.0821
pH equivalents
- 1e^-8 = 8pH
- 1e^-6 = 6pH
- 1e^-11 = 11pH
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 definition

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

= moles
Determining number of ions

moles x Avogadro (6.02e²³) = # ions
Litmus paper color changes
- Red Blue in base
- BlueRed 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?

Erythrocytes (RBCs)
Difference between nucleotide and nucleoside:

Nucleotides have phosphate groups and nucleosides do not.