Chem Exam 1 - with ans.

Chem Exam 1 - with ans. - February 2008 100 Points Name: _...

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February 2008 Name: _______________________ 100 Points CHEMISTRY 1031 (PRICE) – PRACTICE EXAM I - ANSWERS Multiple Choice Questions (3 points each): 1. Chemistry is a science that studies the composition and properties of: A. gases B. liquids C. solids D. all of the above 2. Which states of matter are present when fusion occurs? A. solid and gas B. solid and liquid C. solid and gas D. solid, liquid and gas 3. Which of the following physical changes requires the input of energy? A. deposition B. condensation C. sublimation D. freezing 4. In the chemical reaction: CaCO 3 (s) + heat Æ CaO(s) + CO 2 (g) A. CaO(s) and CO 2 (g) are reactants B. Heat is a reactant C. CaCO 3 (s) is a reactant D. Heat is a product 5. The chemical symbol for sodium is: A. S B. Sm C. Na D. Si
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February 2008 Name: _______________________ 100 Points 6. B is the chemical symbol used for the element: A. boron B. beryllium C. bromine D. barium 7. Black coffee is: A. a chemical B. a homogenous mixture C. a pure liquid D. a heterogeneous mixture 8. An example of a heterogeneous mixture would be: A. bottled water B. salt water C. tap water D. pond water 9. In the chemical reaction in question 4, if 8.50 g of CaCO 3 (s) is heated and 4.76 g of CaO(s) are produced, how many grams of CO 2 (g) will be formed? A. 4.76 g B. 3.74 g C. 8.50 g D. 13.26 g 10. In 1807, an atomic theory was proposed by: A. Mendeleev B. Dalton C. Lavoisier D. Priestley 11. There are a few compounds known that we call non-stoichiometric. One example is TiH 1.7 . These types of compounds do not obey:
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Chem Exam 1 - with ans. - February 2008 100 Points Name: _...

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