Chem Unit Test Review Part I Name: (we have a unit test coming up in just over a week! So let’s start getting ready…) Part I: Bond Types and Naming – 1st identify the correct Bond Type or substance (ex. Acid) and then name according to the rules for that type: Choose from covalent, ionic, ALKANE or ACID 1. CaF2 ______________________ 7. NH3 _______________________ 2. P2O3 _____________________ 8. Ti(SO4)2 ___________________ 3. AgNO3 ___________________ 9. CH4 _________________________________ 4. Al2(CO3)3 __________________ 10. H3P ____________________ 5. NaBr _____________________ 11. C9H20____________________ 6. H2SO4 ____________________ 12. H2SO3 ____________________ Part II: Basic Chem Math Problems 1) How many grams are there in 4.5 moles of copper (II) chloride? 2) How many moles are there in 4.5 x 1024 molecules of boron trichloride? 3) How many molecules are there in 45 moles of diphosphorus trioxide? 4) How many molecules are there in 23 grams of sulfur dioxide? 5) How many ions are present in 83 grams of ammonium nitrate? 6) How many molecules are in 450 grams of oxygen? 7) How many grams are in 1.0 x 1024 molecules of SiO2? 8) How many molecules are there in 2280 grams of methane? Part III: Writing the Complete Equation and identifying REACTION TYPE Write the complete chemical equation for each of the following chemical reactions: Remember not to get distracted by the “wordiness” of a problem. Just isolate the info you need. Don’t forget to balance. Use other paper if necessary. 1. When iron solid is placed in liquid lithium sulfate and electricity is added to it, iron (II) sulfate crystals and solid lithium metal are formed. Reaction Type: __________ Balanced Equation: 2. When the ethanol (C2H6O) in some gasoline burns with oxygen gas in an automobile engine, it forms carbon dioxide gas and water vapor. Reaction Type: __________ Balanced Equation: 3. When the pressure on an aqueous solution of carbonic acid is decreased to 0.1 atmospheres, it decomposes to form carbon dioxide gas and water. Reaction Type: __________ Balanced Equation: 4. When iodine gas reacts with methane gas at very high temperatures, CH3I gas and hydrogen iodide gas are formed. Reaction Type: __________ Balanced Equation: 5. When dinitrogen hexaiodide crystals are hit with a hammer, they spontaneously and explosively decompose to form nitrogen gas and iodine powder. Reaction Type: __________ Balanced Equation: 6. When hydrochloric acid gas reacts with gaseous ammonia, water vapor and solid ammonium chloride are formed. Reaction Type: __________ Balanced Equation: Sneak Preview of Bonus Questions: The only Bonus on the test will be problems like this! Using your knowledge of mole calculations and unit conversions, determine how many atoms there are in 1 Liter of gasoline. Assume that the molecular formula of gasoline is C6H14 and that the density of gasoline is approximately 0.85 grams/mL.