45. Assume that one unit of life is composed of the following chemical formula: C,H,O,P,N. If an ecosystem has 24 atoms of carbon, 80 atoms of hydrogen, 36 atoms of oxygen, 8 atoms of phosphorus, and 8 units of nitrogen, how many units of life could be formed, and which element would be considered the limiting factor? a. 6; carbon b. 8; nitrogen c. 8; phosphorus d. 4; nitrogen e. 4; phosphorus three questions that follow.

45. Assume that one unit of life is composed of the following chemical formula: C,H,O,P,N. If an ecosystem has 24 atoms of carbon, 80 atoms of hydrogen, 36 atoms of oxygen, 8 atoms of phosphorus, and 8 units of nitrogen, how many units of life could be formed, and which element would be considered the limiting factor? a. 6; carbon b. 8; nitrogen c. 8; phosphorus d. 4; nitrogen e. 4; phosphorus three questions that follow.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter4: Energy And Chemical Reactions

Section: Chapter Questions

Problem 123QRT

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A power plant is driven by the combustion of a complex fossil fuel having the formula C11H7S. Assume the air supply is composed of only N2 and O2 with a molar ratio of 3.76:1.00, and the N2 remains unreacted. In addition to the water produced, the fuels C is completely combusted to CO2 and its sulfur content is converted to SO2. In order to evaluate gases emitted at the exhaust stacks for environmental regulation purposes, the nitrogen supplied with the air must also be included in the balanced reactions. a Including the N2 supplied m the air, write a balanced combustion equation for the complex fuel assuming 100% stoichiometric combustion (i.e., when there is no excess oxygen in the products and the only C-containing product is CO2). Except in the case of N2, use only integer coefficients. b Including N2 supplied in the air, write a balanced combustion equation for the complex fuel assuming 120% stoichiometric combustion (i.e., when excess oxygen is present in the products and the only C-containing product is CO2). Except in the case of use only integer coefficients c Calculate the minimum mass (in kg) of air required to completely combust 1700 kg of C11H7S. d Calculate the air/fuel mass ratio, assuming 100% stoichiometric combustion. e Calculate the air/fuel mass ratio, assuming 120% stoichiometric combustion.
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the world's total petroleum reserve is estimated at 2.0x10^22 joules. At the present rate of 1.8x10^20 J/yr, how long will it take to exhuast the supply? Use factor labeling
The manufacture of nitrogen trifluoride is a growing industry, due to its use as a plasma etchant in the semiconductor industry. Nitrogen trifluoride can be synthesized by passing a currentthrough a high-temperature mixture of ammonium fluoride and hydrogen fluoride, withhydrogen gas as a byproduct. In one synthesis, 1.20x103g ammonium fluoride is reacted with1.20x103g hydrogen fluoride to produce 5.00x102g nitrogen trifluoride. What is the limitingeactant, excess reactant, theoretical yield of nitrogen trifluoride, percent yield, and mass ofxcess reactant remaining after the reaction?
A typical frostless refrigerator uses 655 kWh of energy per year in the form of electricity. Suppose that all of this electricity is generated at a power plant that burns coal containing 3.2% sulfur by mass and that all of the sulfur is emitted as SO2 when the coal is burned. If all of the SO2 goes on to react with rainwater to form H2SO4, what mass of H2SO4 does the annual operation of the refrigerator produce? (Hint: Assume that the remaining percentage of the coal is carbon and begin by calculating ∆H° rxnfor the combustion of carbon.)
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an important flavor component of vanilla extract is vanillin C8H8O3 molar mass = 152.15 g/mol when vanillin burns in a bomb calorimeter with a heat capacity of 12.16 kJ/ celsius the temp increases from 24.56 celsius to 30.60 celsius. if the heat of combustion of vanillin is -3760 kJ/mol what mass of vanillin (in g) was combusted? answer to two decimal places
As part of the aspirin synthesis lab the orgo students also had to perform the following calculation to demonstrate their knowledge. Are you able to help them work this out? Saponification is a process in which soap is produced from the chemical reaction between animal fat (triglycerides) and a strong base such as KOH. An example of such balanced chemical reaction is shown here: C51H98O6 + 3KOH → C3H5(OH)3 + 3C16H31O2K (Triglyceride) (Soap) if during the saponification reaction 231.5 g of C51H98O6 is mixed with 231.5 g of KOH and 160 g of soap is produced. Calculate the theoretical yield of soap C16H31O2K and indicate who is the limiting reactant. (Provide your answer to 2 decimal places) Calculate the percent yield for this reaction (Provide your answer to 1 decimal place) *Show ALL steps and mathematical equations involved in your calculations to help the orgo students. Remember to label all…

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