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- At 200°C, the equilibrium constant (Kp) for the reaction below is 2.40 × 103. 2NO (g) N2 (g) + O2 (g) A closed vessel is charged with 36.1 atm of NO. At equilibrium, the partial pressure of O2 is __________ atm.11.68 Acetylene (ethyne) gas reacts with oxygen and burns at 3300 °C in an acetylene torch. (7.4, 7.7, 8.6, 11.4, 11.5) a. Write the balanced chemical equation for the complete combustion of acetylene. b. What is the molar mass of acetylene? c. How many grams of oxygen are needed to react with 8.5 L of acetylene gas at STP? d. How many liters of CO2 gas at STP are produced when 30.0 g of acetylene undergoes combustion?46. 7:03 O 48 6.1 Colligative Properties of Nonelectrolyte Solutions: Vapor-.. Questions Question 5/10 What is the vapor pressure of an aqueous solution that has a solute mole fraction of 0.300? The vapor pressure of water is 25.756 mmHg at 25 °C. Choose an answer 1.00 mmHg 2.45 mmHg 6.03 mmHg 18.03 mmHg Answer
- A stock solution of drug Y is available at 10%w/v. You need to dilute this with Syrup, BP in order to supply a patient with a solution containing 5mg/mL of drug Y. Assuming no volume displacement effects, what is your formula for the preparation of 100 mL of the final solution?The molar stability of mercury (II) sulfide is below. What is the Ksp ?Ferrous sulfate is one dietary supplement used to treat iron-deficiency anemia. What are the molecular formula and molecular mass of this compound? howmany milligrams of iron are in 250 mg of ferrous sulfate?
- 75 mL of 0.300 mol/L sodium phosphate solution is combined with 67.5 mL of 0.350 mol/L calcium bicarbonate. a)Before you begin your reaction, you must accurately produce 1.500 L of your sodium phosphate solution from sodium phosphate trihydrate solid. Write out a procedure to explain all the steps you will take in the lab when making the solution to ensure that your solution concentration is accurate. Please include calculations that show the required mass of solid. Also include the correct names of all equipment used. b)You have a super powerful microscope in your lab! You are able to zoom in on your sodium phosphate solution and take a picture at the molecular level. Label the diagram on the left with the correct choices from the box on the right. You may use arrows or rewrite the symbols in one appropriate place. c)In one sentence, explain what the diagram is showing.original molarity= .548 A 5.00 mL sample of this KOH solution is added to a 100 mL volumetric flask, and water is added to the mark. What is the new molarity of K+ ions in this solution?Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. Co(NO3)2 (or CoCl2)From the stock solution (1.0 M), determine the volume needed to prepare 0.00, 0.04, 0.08, 0.12 and 0.16 M Co(NO3)2 solution in 50 mL volumetric flask. Obtain the calculated amounts, place in corresponding volumetric flasks and dilute to mark.
- A helium gas cylinder of the sort used to fill balloons has a volume of 0.180 m3 and a pressure of 150 X 105 Pa (150 atm) at 298 K (25 °C). How many moles of helium are in the tank? How many grams?49.10 Lactic Acid Salicylic Acid 48 5 g 2g Trichloroacetic Acid Flexible Collodion q.s. ad 100 g Sig: wart remover. Use as directed. (a) Flexible collodion contains 20% w/w camphor and 30% w/w castor oil. How many grams of each would be contained in 30 g of the mixture? (b) The specific gravity of castor oil is 0.955. How many milliliters of the oil are contained in 30 g of the mixture? (c) If the specific gravity of the mix- ture is 0.781, what are the w/v con- centrations of lactic acid, salicylic acid, and trichloroacetic acid in the mixture? 49. (a) 5.34 g camphor and 8.01 g castor oil (b) 8.39 mL castor oil (c) 3.12% w/v lactic acid, 3.91% w/v sali- cylic acid, and 1.56% w/v trichloroacetic acidName PS. 3.5 Chemical Reactions 5. Aluminum was first produced in 1825 by Hans Oersted using the following reaction. KCI (s) K (s) AICI, (s) Al (s) 6. Silver is recovered from silver ore by converting the ore into silver sulfate which is then reacted with copper. Cu (s) Ag,S0, (aq) 7. Phosphoric acid is produced at a fertilizer plant. H,SO, (aq) + Ca (PO,)2 (s) 8. Bromine is commercially produced from MgBr, found in sea water. Cl, (g) MgBr, (aq) 9. Hydrogen sulfide (sour) gas from a wild natural gas well reacts with the lead (II) chromate pigment in paint on homes. H,S (g) PbCrO, (s) 10. Hydrogen sulfide gas from a wild sour natural gas well reacts with the silver in cutlery and ornaments in homes. H,S (g) Ag (s)