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Wednesday, February 5, 2014

Chem Help

Practice Test for 6.1-6.3 1. Complete the following grand calculations: a. What is the chiliad of a resolvent containing 25.3 grams of copper (II) chloride dissolved in one hundred forty mL of water? b. How many grams of sodium hydrated oxide are needed to make 2 L of a 0.05 M settlement? 2. A student dissolves 0.350 moles of potassium nitride (K3N) in 0.650 L of water. c. Calculate the molarity of the solving. d. What is the immersion of potassium ions? e. What is the concentration of nitride ions? f. What is the play off concentration of ions? 3. How many times more acidic is a rootage with a pH of 3 than a solution with a pH of 5? 4. Complete the following calculations and bespeak whether the nerve centre is acidic, basic, or neutral: g. What is the pH of a solution with a pOH of 11.4? h. What is the henry concentration of a solution with a hydroxide concentrat ion of 6 x 10-5? i. What is the hydrogen concentration of a solution with a pOH of 3.7? j. What is the pH of a substance with a hydroxide concentration of 4 x 10-5? k. What is the hydroxide concentration of a substance with a pOH of 8.5? 5. import the disassociation equation for each of the following: l. sodium convert m. magnesium hydroxide n. atomic number 20 bromide. 6. retract the Lewis structure for CH3Cl. o. How many valence electrons does this molecule reach? p. What is the variant of this molecule? q. What is the bond angle? r. Is the molecule frosty or nonpolar? s. What is the dominant intermolecular force fall in in this molecule? Answers: 1a. 1.34 M; b. 4 grams; 2a. 0.538 M; b. 1.614 M; c. 0.538 M; d. 2.152 M; 3. 100 times; 4a. 2.6, acidic; b. 2 x 10-10 M, basic; c. 5.01 x 10-11 M, basic; d. 9.61, basic; e. 3.2 x 10-9 M, acidic; 5a. Na2SO4 ? 2 Na+ + SO42-; b. Mg(OH)2 ? Mg2+ + ! 2 OH-; c. CaBr2 ? Ca2+ + 2 Br-; 6a. 14; b. tetrahedral; c. 109.5°; d. polar; e....If you want to get a full essay, company it on our website: OrderCustomPaper.com

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