Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# Formulas & Equations

### Chemistry Chapter 3

Question | Answer |
---|---|

the sum of the atomic masses of all the atoms in a molecule | molecular mass |

the sum of the atomic masses of all atoms in a formula unit of a compound | formula mass |

the quanitity of a given substance that contains as many molecules or formula units as the number of atoms in exactly 12 g of carbon-12. The amount of substance containing Avogadro's number of molecules or formula units. | mole (mol) |

the number of atoms in a 12-g sample of carbon-12, equal to 6.02 x 10^23 to three significant figures | Avogadro's number |

the mass of one mole of substance. In grams, it is numerically equal to the formula mass in atomic mass units. | molar mass |

the mass percentages of each element in a compound. | percentage composition |

parts per hundred parts of the total, by mass | mass percentage |

the formula of a sub-stance written with the smallest integer (whole-number) subscripts | empirical (simplest) formula |

the calculation of the quantities of reactants and products involved in a chemical reaction | stoichiometry |

the reactant that is entirely consumed when a reaction goes to completion | limiting reactant (reagent) |

the maximum amount of product that can be obtained by a reaction from given amounts of reactants | theoretical yield |

the actual yield (experimentally determined) expressed as a percentage of the theoretical yield (calculated) | percentage yield |

Created by:
723851979