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Draw a model showing the aqueous Ca2+ and Cl- ions (the ions surrounded by water molecules) showing the correct orientation of water molecules around the cation and anion.
How much heat energy is needed to raise the temperature of a 0.50 L of ethanol (d = 0.79 g/mL) from 20.0°C to 50.0°C. Specific heat capacity of ethyl alcohol = 2.45 J/g°C
For the reaction 2 HCl + Na2CO3 → 2 NaCl + H2O + CO2 what volume of 0.45 M HCl solution would be needed to produce 2.5 L of CO2 at STP
Determine how much heat is evolved or absorbed when 30.0 g of lithium iodide completely dissolves in water.
A sample of H½O with a mass of 46.0 grams has a temperature of -58.0 C. How many joules of energy are necessary to melt 46.0 grams of ice? (Use 2.1 J/g.C for the specific heat of ice, and 334.4 J/g for the heat of fusion of water.)
Explain the role of a spin vane or boiling stones that are added to a liquid that is to be heated or distilled
draw a six-carbon-chain portion from syndiotactic polypropylene in which the groups lie on alternating sides of the
What mass of solid sodium formate (of MW 68.01) must be added to 110 mL of 0.55 mol/L formic acid (HCOOH) to make a bu?er solution having a pH of 3.84? Ka = 0.00018 for HCOOH
Calculate the electrode potential of the following half cell if it was at standard conditions. Then recalculate how this changes using.
Which of the following are typically TRUE of an oxidizing agent? 1. It causes oxidation. 2. It gains electron(s). 3. It is the reduced substance. 4. all 5. none
A syringe containing 1.55ml of oxygen gas is cooled from 95.3C to 0.0C. What is the final volume of oxygen gas
If these two samples are mixed and then compressed in a 1.3 L vessel, what is the final pressure of the mixture. Assume that the temperature remains unchanged.
Sodium sulfate is slowly added to a solution containing 0.0500 M Ca2 (aq) and 0.0370 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate
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