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1) Calculate the final temperature of 63 mL of ethanol initially at 11 °C upon absorption of 527 J of heat. (density of ethanol = 0.789 g/mL)?
2) 225.0 mL of ethanol (density = 0.789 g/mL) initially at 7.4°C is mixed with 32.1 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?
The excess I2(aq) left over from the above reaction was titrated with 11.37 mL of 0.0105 M thiosulfate (S2O32-) as follows: I2(aq) + 2S2O32-(aq) → 2I1-(aq) + S4O62-(aq)
A sample of an unknown compound was analyzed and found to contain 19.97% phosphorus and oxygen - what is the empirical formula of the compound
Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using the average volume of NaOH.
In the first 12.0 s of the reaction, 1.8×10-2 mol of {rm{O}}_2 is produced in a reaction vessel with a volume of 0.260 L. What is the average rate of the reaction over this time interval?
compute the total pressure atmosphere atm of a mixture of helium gas he of 0.0200 molnbsp and 0.0100 mol of hydrogen h2
What is the acceleration due to gravity at a point 5 cm from the center of a centrifuge rotor spinning
If the equilibrium concentration of Cd2+ ion is 1.5 X 10-6 M, calculate the equilibrium concentration of OH- in an aqueous equilibrium between solid Cd(OH)2 and its ions. (Ksp for Cd(OH)2 is 2.5 X 10-14)
when 0.120 mol of carbonis burned in a closed vessel with 6.90g of oxygen. how many grams of carbon dioxide can form??
Ammonia is used for refrigeration. the heat of vaporization of ammonia is 23.35kJ/,mol. How many grams of ammonia would have tovaporize toofreeze one tray of ice cubes
The sedimentation coefficient of a certain DNA in 1 M NaCl at 20 oC was measured by boundary sedimentation at 24,630 rpm. The following data were recorded time (min) distance (cm) 16 6.2687 32 6.3507 48 6.4380 64 6.5174 80 6.6047 96 6.6814 A.
Sulfur dioxide gas reacts with oxygen to produce gaseous sulfur dioxide. when the pressure on the reaction at equilibrium is lowered, the equilibrium will
a gas mixture of a amp b containing 1.5 mole a and 98.5 mole b is to be contacted by a pure liquid in a packed
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