39. ** Questions 37 through 39 use the reaction: 2 Fe (s) + 6 HCI (aq) → 2 FeCl3 (aq) + 3 H2 (g) When 1.836 mol iron react with 98.63 ml of 1.905 M hydrochloric acid how many moles of hydrogen gas form? Select one: a. 0.1879 mol b. 5.508 mol c. 2.754 mol d. 0.09395 mol e. 0.03132 mol f. 0.5637 mol g. 0.9180 mol h. none of these

39. ** Questions 37 through 39 use the reaction: 2 Fe (s) + 6 HCI (aq) → 2 FeCl3 (aq) + 3 H2 (g) When 1.836 mol iron react with 98.63 ml of 1.905 M hydrochloric acid how many moles of hydrogen gas form? Select one: a. 0.1879 mol b. 5.508 mol c. 2.754 mol d. 0.09395 mol e. 0.03132 mol f. 0.5637 mol g. 0.9180 mol h. none of these

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 31CR

See similar textbooks

Similar questions

Suppose that you are closing a cabin in the north woods for the winter and you do not want the water in the toilet tank to freeze. You know that the temperature might get as low as 30. C, and you want to protect about 4.0 L water in the toilet tank from freezing. Calculate the volume of ethylene glycol (density = 1.113 g/mL; molar mass = 62.1 g/mol) you should add to the 4.0 L water.
Magnesium metal reacts with hydrochloric acid to form aqueous magnesium chloride and hydrogen gas. When 7.30 g of magnesium metal is added to 100.0 mL of 3.00 M hydrochloric acid solution, what mass of hydrogen gas is produced, assuming the reaction goes to completion? a) Not enough information is provided. b) 0.302 g c) 0.605g d) 0.247 g e) 0.151 g
A 1.06 den silk fiber has reached its maximum tenacity value. How many grams (force) would it take to rupture such fiber when dry?
One of the reactions in the Solvay Process involves the reaction of calcium oxide with water toproduce slaked lime (calcium hydroxide).CaO(s) + H O2 (l) - Ca(OH)2 (s)A lab technician performs the experiment and uses 54.8 g of calcium oxide to react with a setamount of water. When the reaction is completed, the technician uses a filtration apparatus tocollect the mass of calcium hydroxide produced. The following data is recorded:Mass of filter paper: 1.24 gMass of filter paper and solid: 68.04 g What is the theoretical mass of calcium hydroxide that is predicted to be produced? What mass of precipitate was collected in this experiment? What is the percent error? Comment on the validity of the results
In biological systems, enzymes are used to accelerate the rates of certain biological reactions. Glucoamylase is an enzyme that aids in the conversion of starch to glucose (a sugar that cells use for energy). Experiments show that 1 μg mol of glucoamylase in a 4% starch solution results in a production rate of glucose of 0.6 μg mol/(mL)(min). Determine the production rate of glucose for this system in units of lb mol/(ft3)(day). A. 0.0015 lb mol/(ft3)(day) B. 0.0315 lb mol/(ft3)(day) C. 0.0539 lb mol/(ft3)(day) D. 0.3569 lb mol/(ft3)(day)
BSA for concentration measurements is often prepared as a 10 mg/mL stock solution. Suppose you wish to prepare a series of 10 mL solutions of BSA at 1.0, 0.8, 0.6, 0.4, and 0.2 mg/mL. Using the dilution equation C1 × V1 = C2 × V2, you plan to do this by transferring a calculated volume (V1) of the 10 mg/mL (C1) into a clean test tube, then adding water in sufficient volume to produce 10 mL (V2) at the desired concentration (C2). Complete the table below, showing the volume of stock 10 mg/mL solution you need to add to each tube, and the volume of water you need to add to each. Also, convert the desired mg/mL concentration values to their equivalent in μM (micromolar; 10-6 M).
An unknown sample containing a mixture of NaCl and Na2CO3 was analyzed to determine the % composition of each compound. In the analysis for Na2CO3 (soda ash), the following data were obtained mass of unknown - 0.4436 g conc. of HCl used - 0.25 N initial volume - 0.5 mL final volume - 20.0 mL (MW soda ash) 106.12) 1.) What method was used to determine the concentration of HCl? 2.) What is the net volume of HCl used in the titration? 3.) What is % Na2CO3 in the given sample? NOTE: Round off your answer to a whole number (2 sig fig)
A preparation of soda ash is known to contain 98.6% Na2CO3 (105.99 g/mol). If a 0.678-g sample requires 36.8 mL of sulfuric acid solution for complete neutralization, What is the normality? (The reaction is H2SO4 + Na2CO3 --------> Products)
An environmental scientist obtained the following replicate concentration measurements of methane (CH4) gas at a landfill site: Replicate Measurements CH4 Concentration (mg/m3) 1.0 0.1571 2.2 0.2031 3.0 0.1914 4.0 0.2103 Calculate % error when the scientific community accepts 0.2102 as true value.
An unknown sample containing citric acid (C6H8O7) was analyzed using 0.2347N NaOH. The following data were obtained in one of the trials of the analysis: Mass of Unknown 0.4232 g Initial reading of NaOH 2.50 mL Final reading of NaOH 28.00 mL Write the balanced chemical equation involved. What is the net volume of NaOH reacted? What is the molar mass of citric acid? Calculate % citric acid in the sample.
A chemist samples a river's water to measure the amount of fertilizer runoff from the area farms. In a 0.0775 L sample, the chemist measures 327 μg of nitrate. Express the concentration of nitrate in parts per million (ppm) and parts per billion (ppb). Assume the density of the river water sample is 1.00 g/mL. concentration: ______ppmppm concentration:_______ppb
A flask of 25.0 mL with an unknown concentration of magnesium hydroxide completely reacts with 18.0 mL of 1.0 M hydrochloric acid solution according to the equation : HCl (aq) + Mg(OH)2 (aq) -> MgCl2(aq) + H2O (l) Determine the concentration of the magnesium hydroxide solution using dimensional analysis when possible.