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You add 100.0g of water at 55.0C to 100.0g of ice at 0.00C. Some of the ice melts and cools the water to 0.00C. When thermal equilibrium is established at 0.00C, what mass of ice has melted?
Delta H of fusion for water is 333 J/g.
A solution composed of 20.00 g C2H5OH in 60.00 g CCl4 has a density of 1.280 g/mL. Calculate the molarity of C2H5OH in the solution.
The rate constant of a reaction is 7.4 x 10^-3 s-1 at 25 Celsius, and the activation energy is 33.6 kJ/mol. What is k at 75 Celsius?
what would be the formula for the compound sample if a sample of a compound contains 1.36 mol of nitrogen atoms and
a sunscreen preparation contains 2.50 by mass benzyl salicylate. if a tube contains 4.0 ounces of sunscreen how many
Determine the amount of heat (in kJ) given off when 1.89 104 g of ammonia are produced according to the following equation. Assume that the reaction takes place under standard-state conditions at 25.0°C.
Calculate Heat Quantity of Heat Energy in Kilojoules required to melt 0.0980 mol ice to liquid water at 0 Degrees Ceslsius
what is the pH of the benzoic acid solution prior to adding sodium benzoate? B. how many grams of sodium benzoate should be added to prepare the buffer? neglect the small volume change that occurs when the sodium benzoate is added.
24-Determinethe empirical and molecular formulas of each of the following substances. a) Epinephrine (adrenaline), a hormone secreted into the bloodstream in times of danger or stress
Explain which alkyne below would give two different ketones in approximately the same amount with the H2SO4 / Hg2+ catalyzed addition of water
IF a semipermeable membrane is placed between the following solutions. Explain which solution will increase in volume. Solution C: 5.22% NaCl Solution D: 14.8% NaCl
Determine the [H+] and the pH of a buffer containing 0.20 M acetic acid and 0.10 M sodium acetate. 2. Calculate the percent dissociation of acetic acid in this solution
H ow many moles of oxygen are formed when 58.6 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.11 g/mol. 4 KNO3(s) ? 2 K2O(s) + 2 N2(g) + 5 O2(g)
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