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Test+1+Worksheet

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Test+1+Worksheet Powered By Docstoc
					                                 Test 1 Review
Part 1:
  1. All pure substances are either:
  a) elements
  b) diatomic
  c) molecules
  d) compounds
  e) a & d
  2. Match the following element names to their symbols:
     Hydrogen                                    He
     Lithium                                     Cl
     Boron                                       C
     Nitrogen                                    P
     Fluorine                                    Na
     Sodium                                      Mg
     Aluminum                                    Si
     Phosphorus                                  O
     Chlorine                                    Ar
     Helium                                      H
     Beryllium                                   Li
     Carbon                                      S
     Oxygen                                      N
     Neon                                        F
     Magnesium                                   Ne
     Silicon                                     Al
     Sulfur                                      Be
     Argon                                       B
  3. At room temperature and atmospheric pressure, the element iodine is best
     described as:
     a) A diatomic gas
         b) A monatomic gas
         c) A crystalline solid
         d) A polyatomic liquid
         e) None of the above
   4. For each of the following identify whether the substance is a solution,
         heterogeneous mixture, homogeneous mixture, pure substance, element or
         compound (NOTE: more than one label can apply to a single substance)
   a) Blood
   b) Rubbing Alcohol
   c) Water
   d) Silver
   e) Wishbone Italian Salad Dressing
   5. How many significant figures are in each of the following numbers?
4.003                                     7.0500x10-3
5000                                      3.774
        4
2.3x10                                    1.700
601                                       307.080
6.3050                                    .054
   6. Round each of the following numbers to four significant figures, and express the
         result in standard exponential notation:
         a) 102.53070
         b) 656,980
         c) 0.008543210
   7. Carry out the following operations, and express the answers with the appropriate
         number of significant figures.
         a) 952.7 - 140.7389
         b) 296 x 32.456
         c) [(285.3 x 105) – (1.200 x 103)] x 2.8954
         d) (0.0054 x 20,000.0) + (2813 x 12)
   8. If a woman has a mass of 115 lb, what is her mass in grams?
  9. Perform the following conversions: (454 g = 1 lb, 1 ton = 2000 lbs.)
  a) 23.5 tons to mg


  b) The mass in grams of 6.00 gallons of a liquid with a density of 0.917 g/mL (1 L =
     1.06 qt).




  10. J.J. Thompson discovered:




  11. R.A. Milliken discovered:


  12. Using his gold foil experiment Ernest Rutherford came to what three conclusions?




Part 2:
  1. Name the following ionic compounds:
     a) NH4F
     b) CaCO3
     c) Li2SO3
     d) NiPO4
     e) Fe(HCO3)2
  2. Write the formulas of the following ionic compounds:
     a) lithium acetate
     b) iron (II) phosphate
     c) calcium bromide
     d) copper (II) chlorate
     e) cobalt (III) chromate
  3. Name the following acids:
     a) H2SO3
   b) H2S
   c) H3PO4
4. Write the formulas of the following acids:
   a) hydrofluoric acid
   b) carbonic acid
   c) nitrous acid
5. Name the following molecular compounds:
   a) N2O4
   b) NO
   c) As2O5
   d) CCl4
6. Write the formulas of the following molecular compounds:
   a) carbon monoxide
   b) Dinitrogen monoxide
   c) Carbon tetrabromide
   d) Phosphorus pentabromide
7. Find the formula weights and molar masses of the first three ionic compounds we
   named.




8. Find the molecular weights and molar masses of the first three molecular
   compounds we named.




9. A sample of the male sex hormone testosterone, C19H28O2, contains 7.08 x 1020
   hydrogen atoms.
   a) How many atoms of carbon does it contain?
          b) How many molecules of testosterone does it contain?




          c) How many moles of testosterone does it contain?




          d) What is the mass of this sample in grams?




   10. What kind of reactions are the following? Balance:
          a)   C3H8+ O2 CO2+ H2O
          b) CaCl2+ AgNO3 AgCl +           Ca(NO3)2
          c)   KClO3     KCl+ O2
          d) CO+O2CO2
   11. Find the empirical formula of a compound with a percent composition of: 40.00
          % C, 6.72 % H, 53.29 % O. Suppose we knew that the molecular weight of this
          compound was 180 g/mol, what would its molecular formula be?

Part 3:
1. An atom of the most common isotope of gold, 197Au, has ____ protons, ____ neutrons,
and ____ electrons.
a) 79, 118, 118
b) 197, 79,118
c) 79,197, 197
d) 79, 118, 79
e) 118, 79, 39
2. The combustion of 28.8 g of ammonia according to the following reaction consumes
________ g of O2?
4NH3 (g) + 7 O2 (g)  4 NO2 (g) +6H2O (g)
a) 94.65                d) 74.7
b) 94.7                 e) 66.83
c) 26.333

				
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