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Chemical reactions
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Mercury and bromine react with each other to produce mercury (II) bromide: Hg + Br_2 arrow HgBr_2 a) What mass of HgBr_2 can be produced from the reaction 10 g Hg and 9 g Br_2 ? b) What mass of
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Chemical reactions
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When a piece of zinc metal is added to a solution of Cu^{2+}, Zn^{2+} appears in solution and a film of copper metal forms on the piece of zinc metal. What does this tell you about the reactivity of the element zinc relative to that of the element copper?
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Chemical reactions
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A computer uses an 8-character password, including uppercase and lowercase letters and the digits 0 to 9. (a) How many passwords are possible? (b) What is the probability of randomly guessing the password?
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Chemical reactions
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Suppose you eat a serving of green beans. What reactions must occur for the amino acid monomers in the protein of the beans to be converted to proteins in your body?
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Chemical reactions
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Are these physical or chemical changes? 1. Glass breaking 2. Hammering wood together 3. A rusting bicycle 4. Melting butter 5. Separating sand from gravel 6. Burning leaves 7. Cutting your hair 8. Crushing a can 9. Boiling water 10. Water evaporating 11.
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What are the hydrolyzation products of acetyl chloride?
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Chemical reactions
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Why are burning candles and rusting nails examples of chemical changes?
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Chemical reactions
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30 grams of sodium chloride reacts with enough silver nitrate to use all of the sodium chloride in a double replacement reaction. How many grams of silver chloride would be formed?
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Chemical reactions
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True or false? In hydrogenation, water is added across a double bond to make it become single bonds.
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Chemical reactions
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2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed, a gas evolves which is bubbled through a soap solution before te
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Chemical reactions
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Is glass etching by hydrofluoric acid a physical or chemical change?
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Chemical reactions
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An aqueous solution of lead nitrate, Pb(NO3)2, is mixed with one of sodium chromate, Na2CrO4, resulting in the formation of a precipitate of lead chromate. Formulate a balanced molecular equation, a total ionic equation, and the net ionic equation for the
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Chemical reactions
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Define a metathesis reaction and give an example.
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Chemical reactions
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Write a balanced equation for the formation of copper(II) hydroxide from copper(II) nitrate and sodium hydroxide, using a metathesis (double replacement) reaction.
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Chemical reactions
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The hydrogenation of vegetable oils converts liquid oils to semi-solid fats such as margarine and shortening. Hydrogenation involves reacting hydrogen with C=C double bonds to create a C-C single bond. Calculate the heat of reaction in kJ for the followin
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Chemical reactions
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Consider a car fitted with a catalytic converter as part of the exhaust system. The first five minutes or so after the car is started are the most polluting. Explain, in detail, why?
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Chemical reactions
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Classify NaNO2 into one of the following categories: strong acid, strong base, weak acid, weak base, or none of above. (Note: Ka of HNO2 = 4.5 x 10-4) a. Strong Acid b. Strong Base c. Weak Acid d.
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Give a detailed mechanism (show electron flow) for the hydrolysis of cis-norbornene-5,6-endo-dicarboxylic anhydride.
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