Chemistry, 17.02.2020 19:51 antoinetteee03
A student dissolves 11.1 g of potassium hydroxide (KOH) in 250. g of water in a well-insulated open cup. He then observes the temperature of the water rise from 23.0 °C to 34.0 °C over the course of 4.6 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 the 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 and published values for this reaction.
O exothermic Is this reaction exothermic, endothermic, or neither? O endothermic x 6 ? O 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. kJ Calculate the reaction enthalpy AHxn per mole of KOH.
Answers: 1
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Chemistry, 22.06.2019 18:30
Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o sncl2•4h2o sncl2•6h2o
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Chemistry, 23.06.2019 01:40
Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?
Answers: 1
Chemistry, 23.06.2019 05:00
How many atomic mass units are equal to 1.672×10−24 g of protons?
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A student dissolves 11.1 g of potassium hydroxide (KOH) in 250. g of water in a well-insulated open...
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