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How many grams of solid Iodine are produced by the decomposition of 3.8 grams of hydrogen iodide gas? Round your answer to one decimal place. 2HI(g)-->I2(s) + HI2(g)
An iron bar of mass 781 g cools from 94°C to 5°C. Calculate the heat released (in kilojoules) by metal.
A 248 mL gas sample has a mass of 0.436 g at a pressure of 753 mm Hg and a temperature of 27 degrees celcius.what is the molar mass of the gas
A chemist prepares a sample of hydrogen bromide and finds that it occupies 258 mL at 60 degrees celsisus and 476 Torr. What volume would it occupy at 0 degrees celsisus at the same pressure? Answer in units of mL to 5 decimal places.
Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 9.80 solution.
Using Le Chatelier's Principle to predict the effect of a change in conditions on a chemical equilibrium - Predict how the equilibrium of the following reactions will be affected by the changes listed.
How many grams of calcium chloride would you dissolve in water to make a total .111 M calcium chloride solution with 200 mL final volume?
Calculate the amount of work done, in joules, when 2.5 mole of H2O vaporizes at 1.0 atm and 25°C. Assume the volume of liquid H2O is negligible compared to that of vapor. [1 L·atm = 101.3 J]
the concentration of Hcl in a solution by titrations using different indicators to find the end point. Is the difference between indicators 1 and 2 significant at the 95% confidence level?
Consider a 2710-lb automobile clocked by law-enforcement radar at a speed of 85.5 mph (miles/hour). If the position of the car is known to within 5.0 feet at the time of the measurement, what is the uncertainty in the velocity of the car? in mph
Iron(III) is polarographically reduced to iron(II)at potentials more negative than about +0.4V versus SCE and is further reduced to iron(O) at -1.5V (vs SCE). Iron(II) is also reduced to metal at -1.5V.
Calculate the entropy and Gibbs energy of mixing when the partition is removed. Assume that the gases are perfect.
A chemist dissolves 284 mg of pure potassium hydroxide in enough water to make up 140 mL of solution. Calculate the pH of the solution.
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