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A sample of aluminum metal absorbs 9.86J of heat,upon which the temperature of the sample increases from 23.2 C to 39.5 C. SInce the specific heat capacity of aluminum is 0.90 J/g-K, the mass of the sample is what in grams?
What mass of Mg is formed by passing a current of 5.50 A through molten MgCl2 for 2.80 days?
A 1.00 g sample of a manganese steel is dissolved, oxidized to permanganate, and diluted to 500 mL. Using a 1.00 cm optical cell, the absorbance measured is 0.500. What is the % manganese in the steel
The following pairs of soluble solutions can be mixed. In some cases, this leads to the formation of an insoluble precipitate. Decide, in each case, whether or not an insoluble precipitate is formed.
Explain the following observations in terms of shifting equilibria by le Chatelier's principle. Write the equation for the equilibrium involved in each case.
the chromic acid test acetone, formaldehyde, propanal, 3-pentanone, acetophenone, and benzaldehyde
If you have 340.0 mL of water at 25.00 °C and add 120.0 mL of water at 95.00 °C, what is the final temperature of the mixture. Use 1.00 g/mL as the density of water.
An air stream's humidity is increased by combining it with a stream of water as shown below (hr stands for relative humidity). The water evaporates and increases the moisture content of the air stream. Determine the mass flow rate of stream B
Draw the structure of the geometric isomer of 2-pentene that has the lower melting point.
Calculate the pH of a solution made by dissolving 2.89 g of sodium fluoride and 17.1 mL of 0.309 M hydrofluoric acid in enough water to make 177 mL of solution.
What is the equilibrium partial pressure of Cl2 at 250 oC? What is the value of Kc at the same temperature?
caculate the amount of heat liberated ( in kj) from 335g of mercury when it cools from 59.0 to 12.0 c
caluclate the molecular mass of the compounds of Caffeine and Epinephrine. Round to the hundredth's place.
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