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Questions in chemistry

[Homework Help] Electrolysis of a dilute solution of aqueous sodium chloride results in the cathode product: A. Sodium B. Hydrogen C. Chlorine D. Oxygen E. Peroxide

[Homework Help] Which of the following tends to form a cation (positive ion) with a charge of 2+? A. Na B. O C. He D. Mg

[Homework Help] How many moles of sodium hydroxide are produced when 1.00 mol of sodium peroxide reacts with water?

[Homework Help] A test tube containing CaCO₃ is heated until the entire compound decomposes. If the test tube plus calcium carbonate originally weighed 30.08 grams and the loss of mass during the experiment was 4.40 grams, what was the approximate mass of the empty test tube? A. 20.08 g B. 21.00 g C. 24.50 g D. 25.08 g E. 25.68 g

[Homework Help] Which describes a spontaneous reaction? A. Positive ΔH B. Negative ΔH C. Positive ΔG D. Negative ΔG E. Positive ΔS

[Homework Help] You fill a balloon with 2.50 moles of gas at 25°C at a pressure of 1.49 atm. What is the volume of the balloon?

[Homework Help] What are two ways in which the sun's energy can be captured and used? How can both be used in a home?

[Homework Help] Which of the following is not capable of reacting with molecular oxygen? A. SO₂ B. SO₃ C. NO D. N₂O E. P₄O₆

[Homework Help] What is the percentage of water in the hydrate [tex]CoCl_2 \cdot 6H_2O[/tex]?

[Homework Help] Which statement most accurately describes the behavior of a catalyst? A. A catalyst increases the ∆G of a reaction and hence the forward rate. B. A catalyst reduces the ∆H of a reaction and hence the temperature needed to produce products. C. A catalyst reduces the activation energy for a reaction and increases the rate of a reaction. D. A catalyst increases the equilibrium constant and final product concentrations.