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Problem- What is the change in enthalpy (in kJ) under standard conditions when 29.75 g of potassium hydroxide dissolves in water?
Write the complete solution in short and simple way
A 100 liter air tank housed in a gas station ruptured suddenly and air originally at 5atm escaped to the surroundings at 1atm and 25°C. Find ?S of air, had it been let out slowly in a reversible manner
Calculate the molarity of a saturated solution of sodium hydrogen carbonate, NaHCO3 (aq) that contains 69.0 grams in 1.00 liter of solution.
What is the bond order of a molecule with 10 valence electrons 12valence electrons,13 valece electrons,14 valence electrons
If the pH probe was miscalibrated and reports the pH and reports the pH to be 1 unit higher than the true pH of the solution it is in, would the molar mass you report for the solid acid be higher than
Describe synaptic tagging and capture in LTP. What kind of stimulus is necessary for new protein synthesis to occur? What kind of stimulus is necessary for a synaptic tag
determine the rate law and rate constant for the gas-phase reaction of nitrogen monoxide and chlorine.
What is the percent ionization of a 1.3 M weak acid if the pH is 4.6. The pH of a 0.200 M solution of formic acid, HCOOH, is 2.38. What is the Ka for this acid
Electrical devices are often rated with a voltage and a current for example 120 V 5S batteries however are only with a voltage for example 1.5V why?
NiCl2(aq)+ 2NaOH(aq)---> Ni(OH)2(s)+ 2NaCl(aq) how many grams of Ni(OH)2 are produced from the reaction of 35.0 mL of a 1.75M NaOH solution and excess of NiCl2.
Below is the 1H NMR spectrum of the following triazine structure. In the expansions of the spectrum, place the observed multiplicity in the bin above the resonance.
Sodium bicarbonate undergoes thermal decomposition according to 2 NaHCO3(s) Na2CO3(s) + CO2(g) + H2O(g) What happens when 0.20 atm of argon gas is added 1. [CO2] increases 2. [CO2] decreases 3. [CO2] stays the same
Both of the silicon-chlorine single bonds in are polar. In which direction should the polarity arrows point? away from central Si, towards Si, right or left
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