Chemistry

Enzymes are proteins that lower the activation energy of reactions in the body.Which statement is true?ResponsesThey increase the reaction rate by increasing the concentration of reactants.They increase the surface area of the molecules.They increase the reaction rate by decreasing the concentration of products.They increase the reaction rate by acting as catalysts.
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a cu-ni alloy is slowly cooled to 1250oc. both liquid and solid coexist. if the amount of liquid is 71%, determine the overall composition of the alloy (in wt% ni).
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1 mole of c3h8 was mixed with 8 moles of o2, which resulted in total combustion of the hydrocarbon. concentration (molar percent) of o2 remaining after the reaction is: a. 70 mol % b. 50 mol % c. 40 mol % d. 30 mol % e. 10 mol %
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The balance the following equation. Show all of your work using the atom inventory method:____Cr(MnO4)3 + ____Sr(OH)2 ____Cr(OH)3 + ____Sr(MnO4)2
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11.2 dm3 of nh3 (as measured in normal conditions) were dissolved in 100 cm3 of water. what is the mass percent concentration of the obtained ammonia solution?
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A solution with eggs has a [H+] of 1108 M.Which type of solution is this?Responsesionicbasicacidicneutral
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NEED HELP ASAP PLS AND THX PIC IS ATTACHED
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what would be the unit of measurement for a surface area that has degrees farenheit as the height and time as the width?
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You are trying to generate hydrogen gas(H) by reacting calcium with wateraccording to the reactionCa (s) + 2 HO (I) Ca(OH)2 (aq) +H (9)Carrying the reaction out at whichtemperature will result in the quickestproduction of H gas?OA. 0COB. 4 COC. 25 CO D. 100 C
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the electron-domain geometry of a species is the arrangement of electron around the central atom, whereas the molecular geometry is the arrangement of bonded . two species with the same electron-domain geometry may have different molecular geometries, true or false?
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Balance it pls! I got stuck and can't balance it.
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in what range of ph values a newly discovered amino acid could act as a buffer? this amino acid has pk1
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How do you calculate the number of electrons in each energy level sugar has
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What are the best insulators to keep ice from melting for at least twenty minutes? Please name at least 6.
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the element antimony has two stable isotopes, antimony-121 with a mass of 120.90 u and antimony-123 with a mass of 122.90 u. from the atomic mass of sb, 121.76 u, one can conclude that:
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over the past 150 years, the concentration of carbon dioxide in the atmosphere has been controlled by several factors, including
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what is the mole fraction of co2 in a solution made up of 2 ml of 0.002 m solution of co2 and 8 ml of 0.002 m solution of cn-?
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a concentration cell is constructed using silver metal and .05 m and 1.5 m silver nitrate, what is the cell potential to two significant figures and in volts? ecell
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An ester is mixed with LiNHCH3 in order to perform a SNAc mechanism. What is the LUMO in this reaction?A.N p orbitalB.C-N bondC.C-O * bondD.C-O * bond
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Based on your knowledge of Earth History, what event in geologic history do you think is recorded in the Allamuchy Pond sediments? Explain using evidence from the image. ( Use a CER format )
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Which of the following contains less solute at a given temperature and pressure ?unsaturated solution or saturated solution .
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I have included an overview of the topics you MUST include in your presentation.Topic Outlines:Biomass (10 points)1. What does Biomass mean? How is Biomass being used today as a substitute for gasoline to run cars, trucks or buses?2. What are some different ways Biomass is being used to heat homes today?3. Name and explain 3 advantages/disadvantages in using Biomass compared to using Fossil Fuels or other alternative energies (specifically include environmental issues that can happen).4. Explain the energy conversions when producing energy with Biomass. (Use the words: Potential Energy and Kinetic Energy).Geothermal (10 point)5. Where does geothermal energy come from?6. How can geothermal energy be used to create electricity?7. How can geothermal energy be used directly to heat homes and factories?8. What is a heat pump?9. Name and explain 3 advantages and disadvantages in using geothermal energy compared to using fossil fuels and other alternative energies. (Specifically include environmental issues that can happen).Hydroelectric (10 points)10. What is a good definition of hydroelectric power?11. How does moving water get turned into electrical energy? Explain each part of the dam from the moving water to production of electricity.12. Name and explain 3 advantages/disadvantages of getting electricity from hydroelectric power and how it compares to using fossil fuels or alternative energies. (specifically include environmental issues that can happen13. Find one example in the U.S. that uses hydroelectric power to create electricity?Hydrogen (10 points)14. What does using hydrogen as a fuel source mean? How is it combined to create an energy source?15. Explain where hydrogen is found. What are sources of hydrogen found on Earth?16. Name and explain 3 advantages/disadvantages of using hydrogen as a fuel source and how it compares to using fossil fuels and other alternative energies (specifically include environmental issues that can happen.17. What is a fuel cell? How does it work? (include diagram)Solar Power (10 points)18. What is a good definition of solar energy?19. How does a solar cell make electricity? What is it made of?20. Name and explain 3 advantages/disadvantages about solar energy to heat or produce electricity compared to using fossil fuels or other alternatives (specifically include environmental issues that can happen.21. Find an example of solar energy being used in the U.S.?Wind Energy (10 points)22. Where does wind energy come from? What is a good definition of wind energy?23. How does wind energy get turned into electrical energy?24. Name and explain 3 advantages/disadvantages of getting electricity from wind energy compared to using fossil fuels or other alternative energies (specifically include environmental issues that can happen.25. Find an example in the U.S. that uses wind energy to create electricity?
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when a system is at dynamic equilibrium, a) no reactions are occurring. b) a reaction is occurring in only one direction. c) the rates of the forward and reverse reactions are equal. d) all of the reactants have been converted to products
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What would you predict, the solubility of KHT (solid) in pure water compared with the solubility of KHT (solid) in a 0.1 M KCl solution, which one will be higher? Explain your answer.
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