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Two 20.0-g ice cubes at -10.0c are placed into 275 g of water at 25.0c. assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts heat capacity(s) 37.7 jmolk
Heat capacity h20(l) 75.3 jmol k
Enthalpy of fusion of h20 6.01 kj.mol
A sample of oxygen that occupies 2.5 × 10-6 mL at 508 mm Hg is subjected to a pressure of 1.2 atm. What will the final vol ume of the sample be if the temperature is held constant?
A weak monoprotic acid is exactly neutralized by 11.17mL of a standardized 0.1455M NaOH solution. If the Ka of the acid is 0.00084, what is the pH at the half-equivalence point.
A vertical force of 7 N (in the negative z direction) is required to hold the deflector in place. Determine the mass (kg) of the deflector. Assume the velocity of the water remains constant.
Identify the limiting and excess reactions and how many grams of the excess will be unused.
An air sample contains 0.032% CO2 (by mole). If the total pressure is 758mm Hg, what is the partial pressure of CO2
A powder contains FeSO4·7H2O (molar mass = 278.01 g/mol) among other components. A 3.585-g sample of the powder was dissolved in HNO3 and heated to convert all iron to Fe3
NaOH solution is needed to just neutralize excess acid after 20mL of 0.10 M HCl was added to 1 gof the antacid, how many moles of acid can the antacid counteract per gram?
Calculate the amount of heat necessary to raise the temperature of 12.0g of water from 15.4 degrees celsius to 93.0 degrees celsius
The Kf for Cu(en)2^2+ is 1 x 10^20. What is the concentration of Cu^2+ (aq) in the solution?
Which of the following is a mechanism by which enzymes assist in formation of a transition state intermediate? a) Preventing interference by water molecules.
A saturated solution of Mg(OH)2 in contact with undissolved Mg(OH)2(s) is prepared at 25 degrees C. The pH of the solution is found to be 10.17.
If the methane contained in 4.00 of a saturated solution at 25 was extracted and placed under STP conditions, what volume would it occupy?
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