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The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.253 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 26.9°C, what is the minimum temperature reached by the solution?
1.500 g of Mg(s) was combined with 125.0 mL of 1.0 M HCl. The initial temperature was 25.0oC and the final temperature was 72.3oC.
A pound of coffee beans yields 30 cups of coffee (4 cups = 1 ). How many milliliters of coffee can be obtained from 1.0 of coffee beans.
A buffer having equal amounts of a weak acid and its conjugate base has a pH =4.4. A small amount of sodium hydroxide was combined to this buffer solution .
Solving this question helps the student to understand what is happening in a chemical reaction and to balance the given equation.
A sample containing 0.0250 M concentration of a dye in a cell of 1 cm^2 cross section has a measured absorbance of 1.012 at 650 nm.
What are bonding theories? Why are they important? What may they be used for. HI has a force contents of 314 Nm^-1 and a bond length of 160.92 pm.
Calculate the probability of finding an electron that is described by this wavefunction in a volume of 1.0 pm3 (i) centred on the nucleus.
We are asked to explain the pH and how to find hydrogen ion concentration - Find the pH of an acidic substance of your choice.
Comparing potassium nitrate (KNO3) and sodium chloride (NaCl), which chemical's solubility (in water) is most affected by change in temperature.
heat capacity of the bomb calorimeter is known to be 10.6 kJ/C From previous measurements,. Now determine the mass percent of naphthalene(C10H8) in the sample?
In an acid/base titration, knowing that it took 13.14 mili litres of 0.1016 M sodium hydroxide, NaOH to reach the first endpoint of the titration,) from this information, mols of Phosphoric acid present in the sample is 1.335 mols.
Total pressure in kPa 10 seconds after initiation of the reaction if initially there was 88.3kPa of pure N 2 O 5 vapor Enter the total pressure in kPa 10 minutes after initiation of the reaction.
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