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| Whatever is the molar mass (Atomic Mass) of the atom/molecule |
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| Where do hydrogen and oxygen usually go in chemical equations? |
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| Hydrogen generally first, oxygen generally last. An interesting exception is Hydroxide (OH-). |
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| Extensive vs. intensive property |
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| Extensive depends on amount of substance, intensive does not. I.e. temp = intensive, energy = extensive |
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| Temp = measure of how hot or cold a substance is relative to another substance. Heat = energy that flows between objects at different temperatures. |
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| Hydro + nonmetal root + ic + acid |
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| 1 inch = 2.54 cm (exact #!) |
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| Sigfig rules for mult/divide and add/subtract. |
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Mult/Divide: The number of sigfigs in the answer should be the same as the number in the calculation with the smallest number of sigfigs.
Add/Subtract: The amount of decimal places in the answer should equal the number of decimals in the number in the calculation with the smallest number of decimals. |
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| Prefix for molecular compounds: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. |
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| mono, di, tri, tetra, penta, hexa, hepta, octa, nona, deca. p.s. no prefix when the first element named is only one atom. |
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| In molecular compounds which element goes first? |
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The one with the lower group number. Exception: when oxygen is with a halogen the halogen goes first.
If both elements are in the same group the one with the higher period number goes first. |
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| Letter for atomic number and atomic mass? |
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Definition
Atomic Number (# Protons) = Z
Atomic Mass (Protons + Neutrons) = A |
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