}BOBO$dH:H:H:*H@@.Ԁ. 2/-ZChemistry ReviewMathType Sample Documents Bob MathewsClarisWorks 4.0xHH@RHH@d'Kv:d,, ՚   `/].;;e/`՚ e/ٝȬb2]UUd @  Th&\DSETr$;( 8 ? ZBCMN&(r't&0)S00W0X0)0 ) 0)0)/^/W* XZ/W 5 X U [ X  Z `   * /B  C LQ M # $ !N NV ! N O !& "' P( !r (s Qt .  R 1 K T  M 3 - V 6 7 8W 9X =` >i ? T A ?  T  A ? e _ e`*t\hS1\##8o!!X?Jo%?&&8HK&&&Dx]r LY8Y8h p""_  T%H8H8 W<< E5vW22NAn33 8b^k5%5% z/XXHHE;X(6 `|Note: "Crossouts" below were created with From: CHEMISTRY, MOLECULES, MATTER, AND CHANGE the draw feature in AppleWorks, not with MathType. by Atkins and Jones 1999 by W. H. Freeman and company. Used with permission Question 1.31 How many protons, neutrons, and electrons are present in (a) ; (b) ; (c); (d) ? Example 2.13 Converting between mass and amount of a compound Calculate (a) the number of moles of AgBr formula units in 56.4g of silver bromide, which is used in photographic emulsions; (b) the mass of the rocket fuel component dinitrogen tetroxide,in 1.25 mol Strategy Use the same procedure set out in Toolbox 2.4 for converting between the mass and amount of an element. The molar mass of the compound is used for the conversion. Solution (a) The molar mass of AgBr is  The conversion from mass in grams to amount of AgBr in moles is therefore  (b) The molar mass of  is  The conversion from moles to mass in grams is therefore  Example 3.3 Writing a net ionic equation When aqueous solutions of barium nitrate, and ammonium iodate,are mixed, barium iodateprecipitates. Write the net ionic equation for the reaction. Strategy We expect that the net ionic equation will show the formation of solid barium iodate from barium and iodate ions. Follow the procedure in Toolbox 3.2 [in the text] to verify this conclusion. Solution Step 1. The chemical equation is  Step 2. The complete ionic equation, with all the dissolved ions written as they exist in the solutions before and after mixing, is  Step 3. 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