Please do not round off calculations until final answer. Thank you. A student dissolves 14.4 g of potassium hydroxide (KOH)in 250. g of water in a well-insulated open cup. He then observes the temperature of the water risefrom 21.0 °C to 35.2 °C over the course of 5.3 minutes.Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction:KOH(s)K(aq) + OH (aq)You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to thecorrect number of significant digits.Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known andpublished values for this reaction.Is this reaction exothermic, endothermic, or neither?If you said the reaction was exothermic or endothermic, calculate the amount ofheat that was released or absorbed by the reaction in this case.Calculate the reaction enthalpy ΔΗ per mole of KOH.rxn0exothermicendothermicneitherkJkJmol0x10X5

The question is based on the concept of chemical thermodynamics. Whatever heat released during…

A student dissolves 14.4 g of potassium hydroxide (KOH)in 250. g of water in a well-insulated open cup. He then observes the temperature of the water ris from 21.0 °C to 35.2 °C over the course of 5.3 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KOH(s) K+ (aq) + OH (aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to correct number of significant digits. → Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known am published values for this reaction. Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. Calculate the reaction enthalpy AHxn per mole of KOH. O exothermic endothermic Oneither kJ 0- kJ mol 0 X

A student dissolves 14.4 g of potassium hydroxide (KOH)in 250. g of water in a well-insulated open cup. He then observes the temperature of the water ris from 21.0 °C to 35.2 °C over the course of 5.3 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: KOH(s) K+ (aq) + OH (aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to correct number of significant digits. → Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known am published values for this reaction. Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. Calculate the reaction enthalpy AHxn per mole of KOH. O exothermic endothermic Oneither kJ 0- kJ mol 0 X

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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28-31. Supply the missing value. n 1.55 1.65 1.70 1.80 ??? 1.62 Conc. 10% 15% 25% 35% 22% ??? 28-29.a. 1.66 c. 1.70b. 1.68 d. 1.72 30-31.a. 14.24 c. 16.24b. 15.24 d.17.24
With the image attached please do the calculations/calculate what is highlighted in yellow please Please also calculate - percent % error in molar mass - percent % error in pKa Please please please answer as fast as possible
this is analytical chemistry i need full solution thanks
My Cal Poly Portal: Home O Quiz 2 Tuesday Jan. 19 M Mathway | Algebra Problem Solv X C Search All Matches | Chegg.com x G Sadly, you had to sign up for a 7 x+ "canvas.calpoly.edu/courses/40340/assignments/197825 15:31 Time Remaining 4/6 4 points You create a solution by placing 3.00 x 1023 atoms of calcium into 384.6 mL of water. Assuming there is no change in the volume, what is the concentration (M) of the solution? Report answer to 2 decimals. Do not use scientific notation. Do not report units. Type your answer.. Next
Chemistry Question 12: Split injection in GC entails that some of the eluate from the column is split off and does not enter the detector to prevent overload of the detector. some of the sample is split off so that it does not enter the column to prevent overload of the column. a sample is split into smaller volumes that enter the column sequentially to prevent overload of the column. O All these statements are correct. O None of these statements is correct.
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Q Search for 20 minutes. Then return, put it down, and weigh yourself immediately three times. Since reporting your weight is a little too personal, I want you to tell me the variation between each reading (called a first derivative measurement). You should see the first weight is somewhat higher than the rest; often as much as 2-3 pounds. What do you th this tells you about your scale's quality? All other data is provided in the lab procedure Questions So, go ahead and answer them, then. a For measuring the block, (part 1) measure something and tell me what it is. Today, definitions. Here are your lab questions: 1. Define significant figure 2. Define accuracy 3. Define precision 4. How many significant figures are present in the measurement 0.053402 mm? How many are in 0.053400? Calculate the following: For three replicate (repeated) measurements, your values are as follows: 3.510 g; 3.565 g; 3.593 Answer the following questions: a. What is the average? b. the percentage error (the…
nalysis Practice Worksheet.docx al Analysis Practice Worksheet.docx (13.5 KB) Page 1 > of 2 4. How much does a cubic meter of water weigh, in pounds? The density of water is 1.00 g/mL. SEP 10 étv MacBook Pro & 6. 7 %3D { R Y 60 * CO
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1st image is the question statement at the top. 2nd image is the last part of the question which I'm unable to solve. Please help asap.
Help I really have no idea if I calculated it right
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