Worksheet Chapter 4 by parpar


									Worksheet Chapter 4

1.    Classify the following as physical or chemical changes. (a) wood burning (b)
      sugar dissolving in water (c) cutting a piece of paper (d) iron rusting
      (e) milk souring (f) dissolving sodium carbonate in water (g) mixing oil and
      water (h) burning fuel in the engine of a car

2.    Classify each as a chemical or physical property. (a) chlorine is a greenish
      yellow color (b) iron rusts in the presence of oxygen (c) sodium is a solid
      at room temperature. (d) water boils at 100 C (e) water has a density of
      1 g/ml (f) sugar dissolves in water

3.    A block of wood has a volume of 30 ml and a mass of 20 g. What is its

4.    An object has a density of 3g/ml. 200 ml of the object will have a mass of __g.

5.    What is the volume of 500 g of an object with a density of 1.5 g/cm3?

6.    A block of wood has a mass of 40 g and measures 3 cm by 2 cm by 10 cm.
      What is its density? ( Area = L X WX H )

7.    Gold has a melting point of 1063 C and a boiling point of 2966 C. Specify
      its physical state at each of the following temperatures. (a) 500 C (b) 1000 C
      (c) 3000 C (d) 1070 C

8.    Classify each of the following as intensive or extensive properties. (a) length
      (b) density (c) color (d) boiling point

9.    Give the name of the change of state associated with each of the following.
      (a) water is made into ice cubes (b) the inside of your car window fogs up
      (c) perspiration dries (d) changing from a solid to a gas

10.   Classify each of the following as heterogeneous or homogeneous.
      (a) water (b) M&M's (c) eggs (d) sodium (e) salt water solution
      (f) sodium carbonate (g) wood

11.   Pure substances can be ______________or ___________________.

12.   Mixtures can be __________________ or____________________.

13.   Give two examples of a homogeneous mixture and two examples
      of a heterogeneous mixture.
14.   For 1-4 below, tell if (a), (b), or (c) fits the description.
      (a) homogeneous mixture (b) heterogeneous mixture (c) pure

      (1) Salt and Sand (2) Sugar water solution (3) water (4) lithium

15.   Define element and compound.

16.   Indicate whether the following statements are true or false.
      (a) Both elements and compounds are pure substances
      (b) A compound results from the physical combination of
          two or more elements.
      (c) For matter to be homogeneous, at least two compounds
          must be present
      (d) Compounds, but not elements, can have a variable composition

17.   Based on the notation, classify each of the following as: (a) two elements
      (b) two compounds (c) an element and a compound (d) a single pure
      substance ( the letters stand for a chemical symbol)
      (1) Q-Z, Q (2) Q-X, X (3) Q and X (4) Q-X and Q-X

18.   Give names associated with the following symbols. (a) N (b) Ni
      (c) Pb (d) Zn (e) aluminum (f) neon (g) hydrogen (h) gold
      (i) silver
1.    (a) C (b) P (c) P (d) C (e) C (f) P (g) P (h) C

2.    (a) P (b) C (c) P (d) P (e) P (f) P

3.    D = M/V = 20g / 30 ml = 0.67 g/ml

4.    M = DV = (3 g/ml) ( 200 ml) = 600 g

5.    V = M/D = 500g / 1.5 g/cm3 = 333.3 cm3

6.    V = L X W X H = 3 cm X 2 cm X 10 cm = 60cm3

      D = M/V = 40g/60cm3 = 0.67 g / cm3

7.    (a) solid (b) solid (c) gas (d) liquid

8.    (a) E (b) I (c) I (d) I

9.    (a) freezing (b) condensation (c) evaporation (d) sublimation

10.   (a) Ho (b) He (c) He (d) Ho (e) Ho (f) Ho (g) He

11.   Element or Compound

12.   Homogeneous (solutions) or Heterogeneous(salt and pepper)

13.   Homogeneous: salt water solution, sugar water solution - any solution

      Heterogeneous: salt and pepper, rocks and water

14.   (1) b (2) a (3) c (4) c

15.   See text

16.   (a) T (b) F (c) F (d) F

17.   (1) c (2) c (3) a (4) b

18.   (a) nitrogen (b) nickel (c) lead (d) zinc (e) Al (f) Ne (g) H (h) Au (i) Ag

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