L18a-c_Unit_7a-3_ALL[1]

Mass conserva9on coecients are changed in order to

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Unformatted text preview: es. 9.  ar9culate that the atomic mass in the periodic table is the number of grams in a mole of the element. Alterna9vely the atomic mass in the periodic table is the number of grams in an Avogadro’s number of atoms. 10. use the periodic table (atomic mass) to determine the mass (in grams) of a single mole of different substances. 11. interpret the chemical formula to be able to compute the molar mass. 12. convert between moles and masses for an arbitrary amount of ma/er 13. convert between numbers of par9cles, moles and grams – any two! 14. balance chemical equa9ons by moles Where are we at? In Units 1- 5 we spent a lot of 9me talking about atoms and their behavior In Unit 6 we began considering how molecules can and do interact with one another We are now ready to go back to chemical reac9ons and begin trying to understand their value in the macroscopic world ! Stoichiometry What do we already know? Atoms combine with one another to form molecules and compounds: Chemical reac9ons are represented by chemical equa9ons: REACTANT(S) ! PRODUCT(S) The number of atoms of each type of element must be the same on both sides of a balanced equa9on. (Mass conserva9on) Coefficients are changed in order to balance an equa9on The Balanced Chemical Equa9on provides a recipe for a chemical reac9on The Balanced Chemical equa<on The Balanced Chemical Equa9on provides a recipe for a chemical reac9on 2(H2)(g) + 1(O2)(g) ! 2(H2O) (l) Describes the combi...
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