Graphing Calculator Least Common Multiples When writing

Chapter 8, Problem 8.1.126

(choose chapter or problem)

Graphing Calculator Least Common Multiples When writing chemical formulas or balancing a chemical equation, being able to identify the least common multiple of a set of numbers can often help.Your graphing calculator has a least common multiple function that can compare two numbers. On a TI-83 Plus or similar graphing calculator, press MATH 8. The screen should read lcm(. Next, enter one number and then a comma followed by the other number and a closing parenthesis. Press ENTER, and the calculator will show the least common multiple of the pair you entered. Use this function as needed to find the answers to the following questions. a. Tin(IV) sulfate contains Sn4+ and SO4 2 ions. Use the least common multiple of 2 and 4 to determine the empirical formula for this compound. b. Aluminum ferrocyanide contains Al3+ ions and Fe(CN)6 4 ions. Use the least common multiple of 3 and 4 to determine the empirical formula for this compound. c. Balance the following unbalanced equation. P4O10(s) + H2O(g) H3PO4(aq) d. Balance the following unbalanced equation. KMnO4(aq) + MnCl2(aq) + 2H2O(l) MnO2(s) + 4HCl(aq) + 2KCl(aq) e. The combustion of octane, C8H18, and oxygen, O2, is one of many reactions that occur in a cars engine.The products are CO2 and H2O. Balance the equation for the combustion reaction. (Hint: Balance oxygen last, and use the least common multiple of the number of oxygen atoms on the products side and on the reactants side to help balance the equation.)