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25.0 mL of ethanol (density = 0.789 g/mL) initially at 5.4°C is mixed with 34.6 mL of water (density = 1.0 g/mL) initially at 25.3°C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?
Determine how many grams of copper sulphate are there in 219 grams of an aqeous solution that is 20.2% by weight of copper sulphate?
A 10.00 mL 0.25 M formic acid sample is being titrated with 0.25 M NaOH. What is the pH of the solution after adding 15.00 mL NaOH solution?? Ka=1.8x10-4
CHEM 354 Extended Problems, The variation of EMF for the cell below with temperature is shown in the graph below.
62.8 mL of air is collected over water at 24 degrees celsius and 733 mm Hg pressure. find the volume of the dry air at STP
Suppose the volume of this system is compressed to one-half its initial volume and then equilibrium is reestablished. what would be the new equilibrium total pressure.
Electrolysis - Aluminium extraction, a. Aluminium is extracted from its ore by an electrolytic process. One extraction plant uses an applied e.m.f. of 5 V, and a current of 225 000 A. One tonne of aluminium is extracted after 14 hours.
Determine the mass of aluminum acetate that can be made if you do the reaction with 125 grams of acetic acid and 275 grams of aluminum hydroxide.
The rate of the reaction in terms of the "disappearance of reactant" includes the change in the concentration of the reactant, the time interval, and the coefficient of the reactant
For the reaction, calculate how many moles of the product form when 0.048 moles of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Fe + 3O2 ---> 2Fe2O3
what is the total number of joules of heat energy absorbed when the temperature if 200.0g of water is raised from 10 degrees celcius to 40 degrees celcius.
This assignment inhibits chemistry Laboratory Questions.
Calculate the mass of sugar (C12H22O11) that must be dissolved in 700 g of water to prepare 20% sugar solution
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