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Review Game

Review Game. What is the difference between a law and a theory? A law is a summary of observed behavior A theory is an explanation of behavior. How many grams are in a Decagram? 10. What is the appropriate SI unit for the mass of a block of gold? kilogram.

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Review Game

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  1. Review Game

  2. What is the difference between a law and a theory? • A law is a summary of observed behavior • A theory is an explanation of behavior.

  3. How many grams are in a Decagram? 10

  4. What is the appropriate SI unit for the mass of a block of gold? kilogram

  5. Using the rules for significant figures, calculate the following: 6.125 + 70. = ? 76

  6. How many significant figures are in 0.08088 x 1023 4

  7. Give an example of a chemical change. Cooking an egg Burning wood Baking anything

  8. What is this definition of? The products are different substances from the starting materials. Chemical change

  9. Give me an example of an element. Anything on the periodic table. Water and air are NOT elements.

  10. What is another word for a homogeneous mixture? A solution.

  11. According to Dalton, what is the fundamental particle of chemistry? The atom

  12. How many hydrogen atoms are in the formula (NH4)2C6H2O2? 10

  13. Who is credited with discovering electrons? JJ Thompson

  14. Who is credited with doing an experiment showing that the nucleus contains positive charges? Ernest Rutherford

  15. Which atomic particle determines the chemical behavior of an atom? electron

  16. Which particle has the largest mass? Neutron

  17. What is the correct name for PbO? Lead (II) Oxide

  18. What is the formula for ammonium phosphate? (NH4)3PO4

  19. What is the correct name for Sr(NO3)2? Stronium nitrate

  20. What are some clues that a chemical reaction is occurring? Gas bubbles Solid (precipitation) formation Color change Burning

  21. Why do we not place a 1 as a coefficient in balanced equations? It is assumed and therefore not needed to be written.

  22. Why do we NOT change subscripts when writing a balanced chemical equation? Compounds with different numbers of atoms in their arrangement are different substances.

  23. What equation shows only the substance involved in a reaction? Net ionic

  24. Who discovered new information on acids by experimenting with conductivity solutions? Arrhenius

  25. What is ALWAYS a product of an acid reacting with a base? WATER

  26. Why are the standard units of mass (grams) not useful when studying atoms? Because atoms are so small

  27. What does one mole of silver atoms represent? • 6.02 x 1023 atoms

  28. How much does one mole of water weigh? 18 g

  29. What is the molar mass of Barium bromide? 297.1 g/mol

  30. A balanced equation of 2Mg(s) + O2(g) 2MgO(s) tells us that this many moles of magnesium are needed to produce 2 moles of magnesium oxide? 2 moles Mg produce 2 moles MgO

  31. What is the limiting reactant? • The reactant that is completely consumed when a reaction is run to completion.

  32. What is a photon? • A packet of electromagnetic radiation energy.

  33. Which color of visible light has the greatest amount of energy per photon? • ROYGBIV = Violet is the highest

  34. How many valence electrons do elements want to be stable? 8 EXCEPTION - HYDROGEN

  35. Metals make _______ ions. Nonmetals make ______ ions. Metals make cations. Nonmetals make anions.

  36. What is the name of a bond where the electrons are shared? • Covalent

  37. What does Leo goes Ger stand for? • Lose electrons – oxidize • Gain electrons – reduce

  38. Why does oxidation of metals in air go slower than expected? • A thin layer of metal oxide forms on the surface inhibiting corrosion

  39. What is the pressure of 1.5 mol of a gas in a 3.0L container at 22.0 °C? • PV = nRT P = nRT/V (1.5 mol) (0.08206 L mol/K atm) (295K) 3.0L = 12 atm

  40. If the temperature of an ideal gas is raised from 50°C to 100°C while the pressure remains constant, what will happen to the volume? • Volume will increase but NOT double because temperature is NOT in Kelvin.

  41. One mole of CO at STP will occupy how much volume? 22.4 L

  42. What is sublimation? A solid changes directly into a gas without changing into a liquid first.

  43. In soda pop, what is the solvent and what is the solute? • Water is the solvent • CO2, sugar, flavors, etc are the solute

  44. What is the term used by chemists to describe a solution in which a small amount of solute is dissolved in the solution? Dilute

  45. The total mass of a solution is 50g. The solvent mass is 30 g. What is the mass percent of the solute? Mass % = mass of solute x 100% mass of solution Mass of solute = 50g – 30 g = 20 g Mass% = 20g/50g x 100% = 40%

  46. What is the conjugate acid in the following reaction? H2PO4 + HCl H3PO4+ + Cl-

  47. What is the conjugate acid in the following reaction? H2PO4 + HCl H3PO4++ Cl-

  48. What is an acid according to the Bronsted-Lowry definition? A substance that donates a proton

  49. How much more caustic or basic is a pH of 9 compared to a pH of 7? 100 times more basic.

  50. You are mixing two solutions of citric acid. One container is 2M. The other solution contains almost twice as much and is at 4M. If you mix them together, what would you guestimate the new Molarity is? Between 3 and 4

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