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Pushing Electrons

4th Edition

ISBN:9781133951889

Author:Weeks, Daniel P.

Publisher:Weeks, Daniel P.

Chapter3: Mechanisms

Section: Chapter Questions

Problem 115EQ

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You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in the sample containing Fe. Hemoglobin contains 3.83% by mass of a compound called heme (C₃₄H₃₂FeN₄O₄, MW = 616.49 g/mol). You find that your 11.5 mg blood sample contains 27.1 micrograms of Fe. What is the mass percent of hemoglobin in your protein sample?
You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in the sample containing Fe. Hemoglobin contains 3.83% by mass of a compound called heme (C₃₄H₃₂FeN₄O₄, MW = 616.49 g/mol). You find that your 11.5 mg blood sample contains 34.9 micrograms of Fe. What is the mass percent of hemoglobin in your protein sample? -don't prematureley round
For the reaction 2N2O5(g) ® 4NO2(g) + O2(g), the following data were collected. t (minutes) [N2O5] (mol/L) 0 1.24 x 10–2 10 0.92 x 10–2 20 0.68 x10–2 30 0.50 x 10–2 40 0.37 x 10–2 50 0.28 ´ 10–2 70 0.15 ´ 10–2 The initial rate of production of NO2 for this reaction is approximately: A) 6.4 x10–4 mol/L • min B) 3.2 x10–4 mol/L • min C) 1.24 x 10–2 mol/L • min D) 1.6 x 10–4 mol/L • min E) none of these
Br O
(3) A container holding NO2 and CO gas will lose NO2 gas via the reaction NO2 (g) + CO (g) → NO (g) + CO2 (g) A chemist measures the [NO2] over time and finds that plotting 1/[NO2 ] versus time yields a straight line with a slope of 3.56×10-2 M-1·s-1. If the container originally held 1.00 M NO2, what is the concentration of NO2 after 1.50 hour [NO2]1.5 hrs = ___________ How long will it take the [NO2] to drop to 20% of its initial concentration of 1.00 M? T20% = __________
Question 27 ОН-, Неat CN CN CN
QUESTION 4 Which of the following would be the major product(s) of the reaction below? HBr A. yes B. no OH Br OH Br
Remaining Time! 02:29:4. Consider the balanced chemical equations shown below. When a 6.00 g sample of a mixture of iron (Fe) and aluminum (Al) is treated with excess HCl(aq), 0.177 moles of H2 are obtained. What is the mass percentage of Fe in the original mixture? Choose the closest answer. Fe(s) + 2 HCI(aq) FeCl2(aq) - + H2(g) 2 Al(s) +6 HC((aq) 2 AICI3(aq) + 3 H2(g) 96 % 69 % 47 % 33 % 17 % Rack Question Menu - O O
The reduction of iron(III) oxide to iron during steel-making can be summarized by this sequence of reactions: 20(s) +0, (g) =2 CO (g) K, Fe,0, (s) +3 CO (g) =2 Fe (1) +3 CO, (g) K2 The net reaction is: 2 Fe,O, (s) +6C (s) +30, (g)=4 Fe (1) +6CO, (3) K Write an equation that gives the overall equilibrium constant K in terms of the equilibrium constants K, and K,. If you need to include any physical constants, be sure you use their standard symbols, which you'll find in the ALEKS Calculator. K = 믐 Submit Assign Continue MacBook Air F7 000 吕口 000 FA F5
12
A large freshwater (total mass of water 10^5 kg) lake contains no lithium. A sudden spill releases a constant lithium contaminated flow discharging 3.98*10^8 mg of lithium/hr. How long will it take until the lake reaches a lithium concentration of 1.1nmol/kg?
Classify each chemical reaction: Reaction H₂SO3(aq) → H₂O (1) + SO₂(g) Cl₂(g) + 2KI (aq) 2K Cl(aq) + 1₂ (s) K₂SO₂(aq) + Ba(NO₂)₂ (aq) → 2KNO₂ (aq) + BaSO₂ (s) - 16Na (s) + Sg (g) 8 Na₂S (s) Type choose combination decomposition one single substitution double substitution none of the above choose one

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