Chemistry 3&4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| stoichiometry | involves calculations based on chemical formulas and chemical equations
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| Law of conservation of mass | is central to stoichiometry
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| atoms | atoms are neither created nor destroyed in a chemical reaction. Atoms are simply rearranged to yield new substances
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| balancing chemical reactions | formulas of reactants and products can't be changed
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| chemical equations | balanced chemical reactions
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| physical state | (g) gas (l) liquid (s) solid (aq) aqueous(water) solution
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| combustion reactions | involve O2 as a reactant, typically form CO2 and H2O as products
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| relative atomic mass scale | developed in a similar manner for all elements
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| O-16 atom mass | 2.6560 * 10> -23 g
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| atomic mass unit (amu) | the mass of one C-12 atom is assigned a value of 12 atomic mass units (amu), exactly
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| Avogadro's number | 6.02*10>23
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| molar mass | sum of the atomic mass of all atoms of the molecular formula of a molecular substance
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| percent composition of elements by mass | divide the mass of each element in one mole of the compound by the molar mass of the compound, then multiply by 100 to get a percent
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| solution | -homogeneous mixture of two or more substances
- composed of a solvent with solutes dissolved
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| solvent | substance that solutes are dissolved in
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| solute | substances dissolved in the solvent to give a solution
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| solutes | can be a gas, liquid, or solid
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| concentration | amount of solute dissolved in a given quantity of solvent or solution
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| concentrate solution | large amount of solute
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| dilute solution | only a small amount of solute
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| quantitative description | exact measurement of amount of the amount of solute in a given quantity of solvent or solution
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
michaela.rocheleau
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