Systems of Equations
... Since the y coefficients are already the same with opposite signs, adding the equations together would result in the y-terms being eliminated. The result is one equation with one variable. ...
... Since the y coefficients are already the same with opposite signs, adding the equations together would result in the y-terms being eliminated. The result is one equation with one variable. ...
Document
... We need to eliminate (get rid of) a variable. To simply add this time will not eliminate a variable. If there was a –2x in the 1st equation, the x’s would be eliminated when we add. So we will multiply the 1st equation by a – 2. ...
... We need to eliminate (get rid of) a variable. To simply add this time will not eliminate a variable. If there was a –2x in the 1st equation, the x’s would be eliminated when we add. So we will multiply the 1st equation by a – 2. ...
111 Review Outline TRO
... Chromium metal is reacted with copper (II) chloride Key: You must have a balanced equation!! How many grams of chromic chloride are produced from ...
... Chromium metal is reacted with copper (II) chloride Key: You must have a balanced equation!! How many grams of chromic chloride are produced from ...
Section V: Chapter 2
... y 3x 7 , but when y isn’t isolated, the relationship between the variables isn’t explicit. Instead, this relationship is implied by the equation, so we say that it is an implicit equation. ...
... y 3x 7 , but when y isn’t isolated, the relationship between the variables isn’t explicit. Instead, this relationship is implied by the equation, so we say that it is an implicit equation. ...
1.21. Formulae, equations and amounts of substance
... 3.1) A compound of calcium contains by mass 23.29% of calcium, 18.64% of sulphur and 2.32% of hydrogen, the remainder being oxygen. Determine the empirical formula of this compound. 3.2) Compound A, which contains carbon, hydrogen and oxygen only, has 38.7% carbon and 9.68% hydrogen by mass, the rem ...
... 3.1) A compound of calcium contains by mass 23.29% of calcium, 18.64% of sulphur and 2.32% of hydrogen, the remainder being oxygen. Determine the empirical formula of this compound. 3.2) Compound A, which contains carbon, hydrogen and oxygen only, has 38.7% carbon and 9.68% hydrogen by mass, the rem ...
Notes: Moles
... Notes: Moles Atoms are very, very small. 1 atom of hydrogen weighs approximately 1.67 x 10-27 kg. As a result, it’s not very practical to do chemical reactions by counting out the number of atoms or molecules that will be reacting, because we’ll be counting for a very long time! You’ve seen this b ...
... Notes: Moles Atoms are very, very small. 1 atom of hydrogen weighs approximately 1.67 x 10-27 kg. As a result, it’s not very practical to do chemical reactions by counting out the number of atoms or molecules that will be reacting, because we’ll be counting for a very long time! You’ve seen this b ...
5H2O → CuSO4 + 5H2O(g)
... unless it is combined with a metal, in which case it has an oxidation number of –1. 3b) Oxygen usually has an oxidation number of -2. Oxygen in peroxides (O22-) has an oxidation number of -1. ...
... unless it is combined with a metal, in which case it has an oxidation number of –1. 3b) Oxygen usually has an oxidation number of -2. Oxygen in peroxides (O22-) has an oxidation number of -1. ...
3 Quantitative Chemistry Higher IL Pack
... Q1. Calcium carbonate tablets are used to treat people with calcium deficiency. ...
... Q1. Calcium carbonate tablets are used to treat people with calcium deficiency. ...
Introduction
... Electrolytes are ionic and strong acid solutions (e.g., GatoradeTM); Nonelectrolytes are covalent compounds (e.g., sugar); weak electrolytes are in between. ...
... Electrolytes are ionic and strong acid solutions (e.g., GatoradeTM); Nonelectrolytes are covalent compounds (e.g., sugar); weak electrolytes are in between. ...
Chemical Equilibrium – Le Chatelier`s Principle
... However, the value of Kc will depend on the ionic strength. All equilibrium constants depend on temperature and pressure (or volume). In this laboratory we will study Le Châtelier's Principle If a chemical system at equilibrium experiences a change in concentration, temperature, volume, or partial p ...
... However, the value of Kc will depend on the ionic strength. All equilibrium constants depend on temperature and pressure (or volume). In this laboratory we will study Le Châtelier's Principle If a chemical system at equilibrium experiences a change in concentration, temperature, volume, or partial p ...
24 Sept 08 - Seattle Central College
... solids. Tend to lose electrons in reactions to form cations. • Non-metals … poor conductors; not malleable. Tend to gain electrons in reactions to form anions. • Metalloids … both metallic and nonmetallic properties ...
... solids. Tend to lose electrons in reactions to form cations. • Non-metals … poor conductors; not malleable. Tend to gain electrons in reactions to form anions. • Metalloids … both metallic and nonmetallic properties ...
Document
... (aq) in the equation. Being a liquid, H2O will be labeled (l). Adjust the coefficients to ensure that there are identical numbers of each type of atom on both sides of the reaction arrow. Solution The chemical statement “barium hydroxide and perchloric acid react to produce barium perchlorate and wa ...
... (aq) in the equation. Being a liquid, H2O will be labeled (l). Adjust the coefficients to ensure that there are identical numbers of each type of atom on both sides of the reaction arrow. Solution The chemical statement “barium hydroxide and perchloric acid react to produce barium perchlorate and wa ...
chemistry
... If you wish to change an answer, erase your first penciled circle and then circle with pencil the number of the answer you want. After you have completed the examination and you have decided that all of the circled answers represent your best judgment, signal a proctor and turn in all examination ma ...
... If you wish to change an answer, erase your first penciled circle and then circle with pencil the number of the answer you want. After you have completed the examination and you have decided that all of the circled answers represent your best judgment, signal a proctor and turn in all examination ma ...
AP Chemistry Review Assignment Brown and LeMay: Chemistry the
... 11. Classify each of the following as a pure substance or a mixture; if a mixture, indicate whether it is homogeneous or heterogeneous: a) rice pudding b) seawater c) magnesium d) gasoline 15. A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white subst ...
... 11. Classify each of the following as a pure substance or a mixture; if a mixture, indicate whether it is homogeneous or heterogeneous: a) rice pudding b) seawater c) magnesium d) gasoline 15. A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white subst ...
Empirical_and_Molecular_Formulas
... of water = (OJ)1(H2O)3 = 1:3 ratio Double Batch (OJ)2(H2O)6 = 2:6 = 1:3 ratio ...
... of water = (OJ)1(H2O)3 = 1:3 ratio Double Batch (OJ)2(H2O)6 = 2:6 = 1:3 ratio ...
