Name:___________________________
Chapter 6-9 Midterm exam review
Identify the following symbols
28. (g)
29. (aq)
30. →
31. Write the balanced chemical equation and identify the type of reaction:
Sodium metal is added to water and aqueous sodium hydroxide and hydrogen
gas are produced.
32. Complete and/or balance the reaction, then identify the type(s) of reaction:
a. C2H5OH + O2 → CO2 + H2O
b. Cl2 + K → KCl
c. silver nitrate + hydrochloric acid → rewrite the formula and complete
d. HNO2 + Ca(OH)2 →
e. Ammonium nitrate → nitrogen + oxygen + water vapor
33. How many moles of Copper (II) nitrate are in 65.99g?
34. How many grams of dinitrogen tetroxide are in 5.66x1022 molecules?
35. What is the molar mass of sodium sulfite?
36. What is the percent composition of ammonium sulfide?
37. What is the percent composition of CaCO3?
38. Find the empirical formula of a compound that is 39.3 % carbon, 8.3% hydrogen,
and 52.4% oxygen by mass.
39. Analysis of ibuprofen shows that it contains 75.7% carbon, 8.8% hydrogen, and
15.5% oxygen. The molar mass of ibuprofen is 210g/mol. Determine the
empirical and molecular formula of ibuprofen.
40. Which of the following would be insoluble in water? Why?
a. Ca(NO3)2, Fe2S3, KOH, BaCO3
41. Balance, then write the total and net ionic equation:
a. K2CO3(aq) + CaCl2(aq) → KCl(aq) + CaCO3(s)
i. Total ionic equation
ii. Net ionic equation
42. Balance, then write total and net ionic equations
a. NaOH(aq) + H2SO4(aq)→Na2SO4(aq) + H2O
i. Total ionic equation
ii. Net ionic equation
43. Use the reaction: 2LiOH(s) +CO2(g)→Li2CO3(s) + H2O(l)
a. How many grams of carbon dioxide can be removed by 5.5mol LiOH?
b. How many grams of H2O could be made when 3.28g of CO2 react?
44. Use the equation: 2NaN3(s)→2Na(s) + 3N2
a. How many grams of Na can be made form 31.1g of NaN3?
b. How many moles of N2 can be formed from 2.7mol NaN3?
45. 2AgNO3 + NiCl2 → 2AgCl + Ni(NO3)2
B. How many grams of silver nitrate are required to react with 46.99g of nickel
(II) chloride?