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Ammonium phosphate NH43PO4 is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid H3PO4 with ammonia NH3. What mass of ammonium phosphate is produced by the reaction of 9.21g of ammonia? Be sure your answer has the corr
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Identify three metallic elements on the periodic table.
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Magnesium metal is added to 6M hydrochloric acid and reacts according to the following balanced equation: Mg(s) + 2 HCI(aq) rightarrow MgCl_2 (aq) + H_2(g) a. What volume of 1.8 M hydrochloric acid will react with 22.1 grams of Mg? b. What mass of magnes
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Can you help me with these questions? a) what is the ph of 0.10 M sodium acetate? b)what is the ph of 0.100 M ammonium chloride? c) what is the ph pf 0.10 M ammonium acetate? d) what is the pH of
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Assuming you use 2.5 g vanillin and 5.0 mL of a 3.42 M NaBH4 solution, what is the theoretical yield of vanillyl alcohol in moles? in grams? (Hint: you will need to calculate or look up the molar mass
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Which of the following is considered to be the most accurate in measuring volume? a. Mohr pipettes. b. Serological pipettes. c. Disposable pipettes. d. Volumetric pipettes.
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Find the percent by mass of sodium chloride in a 1.25 M NaCl solution. The density of the solution is 1.06 g / ml .
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Does soda water contain sodium bicarbonate?
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What is the mass number of gold?
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What will be the outcome when sodium chloride and metallic sodium are each dissolved in water?
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1. Explain what is happening to electrons when light is emitted in emission spectra. 2. List the possible energy level changes for electrons emitting visible light in the hydrogen atom. What is the name of this series of lines?
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Suppose you tried to combine 42 grams of magnesium with 42 grams of oxygen. Which of the two substances would have some left after the reaction and how much magnesium oxide would be formed?
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While doing a titration lab to determine the concentration of hydrogen peroxide what is the purpose of using acid to dilute the H_2O_2?
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Chemistry
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A 76.00-pound flask of mercury costs $153.50. The density of mercury is 13.534 g/cm3. What is the price of one pound of mercury?
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What is the oxidation number of sodium?
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Chemistry
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What is the pH of a 0.060 M Ba(OH)2 solution?
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Chemistry
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Describe what causes pressure in gases in terms of the particles in the gas.
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The base dissociation equilibrium constant (Kb) for NH2NH2 is 1.70 x 10-6. NH2NH2(aq) + H2O(l) arrow OH-(aq) + NH2NH3+(aq) Calculate the value of the equilibrium constant (Ka) for the hydrolysis of NH2NH3+ as shown in the reaction below. NH2NH3+(aq) + H2O
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A certain gasoline engine has an efficiency of 30.0%. What would the hot reservoir temperature be for a Carnot engine having that efficiency, if it operates with a cold reservoir temperature of 200 degrees C?
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Chemistry
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Calculate the pH of a 0.33 M methylamine solution.
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United States currency is printed using intaglio presses that generate a printing pressure of 9.1 x 10^4 lb/in^2 . A $20 bill is 6.1 in by 2.6 in. Calculate the magnitude of the force (in pounds) tha
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Calculate the solubility of copper (II) phosphate, Cu_3(PO_4)_2 in mol/L. The K_{eq} for copper (II) phosphate is 1.3 times 10^{-37}.
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Using the tables for water, determine the specified property data at the indicated states. In each case, locate the state by hand on sketches of the p-v and T-v diagrams. a) At p=3 bar, T=240 C, find
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What are the 5 classifications of fire and there extinguishing method?
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Chemistry
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Calculate the pH of a 3.8 M solution of boric acid. (Ka = 5.8 x 10-10)
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Write the balanced molecular equation and net ionic equation for the reaction that occurs when solid aluminum oxide reacts with a solution of hydrochloric acid.
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How much would it cost you, in dollars, to buy nails used to build a fence 125.0 ft long if it requires 30 nails per meter? Assume that 40 nails are sold per box at a cost of $0.75 per box.
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Consider a two-stage cascade refrigeration system operating between the pressure limits of 0.8 and 0.14 MPa. Each stage operates on the ideal vapor-compression refrigeration cycle with refrigerant-134a as the working fluid. Heat rejection from the lower c
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What is pharmaceutical organic chemistry?
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Draw the structure of 2-methylpentanoic acid. Include all the hydrogen atoms in your structural formula.
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Chemistry
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How many grams of mercury(II) sulfide are formed when 0.050 L of 0.010 M mercury(II) nitrate reacts with 0.020 L of 0.10 M sodium sulfide?
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Chemistry
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Write the chemical equation for reacting hydrochloric acid with equate (an antacid). The equation should include the states (g, l, aq, s).
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When converting from km to m, how many places would you move the decimal point? In which direction would you move it?
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Chemistry
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Determine the empirical and molecular formula for chrysotile asbestos. Chrysotile has the following percent composition: 28.03% Mg, 21.60% Si, 1.16% H, and 49.21% O. The molar mass for chrysotile is 520.8 g/mol.
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Chemistry
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A beaker of nitric acid is neutralized with calcium hydroxide. Write a balanced molecular equation and a net ionic equation for this reaction.
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Chemistry
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a) Calculate the dosage in milligrams per kilogram body weight for a 170 lb adult who takes two aspirin tablets containing 0.324 g of aspirin each. (Express your answer using three significant figures.) b) Calculate the dosage for a 65 lb child who also t
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On what law is stoichiometry based? Why is it essential to use balanced equations in solving stoichiometric problems?
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Chemistry
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You measure the pH of a 200 gallon pond and find that it is 5. You suspect that the pH dropped because of nitric acid from acid rain. Nitric acid (NHO3) is a strong acid. Assuming that the pH of the water was originally 6.5, calculate the mass of nitric a
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Chemistry
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Calculate the pH of a 0.40 M ammonia solution. (Kb = 1.8 x 10-5)
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Chemistry
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How many grams are in 3 kilograms?
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