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Pure liquid water can be supercooled to temperatures below its freezing point. Consider 10 kg of water cooled as a liquid to -10 Celsius. Let's now add a small crystal of ice (whose mass is negligible) as a "seed" the subcooled liquid causing a change of state to the ice at 0 Celsius. If the process occurs adiabatically and at constant (atmospheric) pressure (a) what is the mass of water that solidifies and (b) what is the change in entropy of the system?
A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g
Determine how many moles each of Na+ and Cl- are in 0.700 L of the saline solution (A physiological saline solution contains 167 mEq/L each of Na+ and Cl-.)?
If 0.5110 g of H2C2O4 x 2H2O completely neutralized 41.39 mL of the stock NaOH soln what is the concentration of the NaOH solution?
A volume of 18.0 L contains a mixture of 0.250 mols N2 , 0.250 mols O2 , and an unknown quantity of He. The temperature of the mixture is 0 degrees C , and the total pressure is 1.00 atm.
If 1.0 atm H2S (g) are added to a 1.0 L flask containing an excess of I2 (s), what will be the equilibrium pressure of HI?
A sample of gas confined in a 2.0L container at 930 Torr and 25oC was heated to 45oC. What was the final pressure?
Use the appropriate standard reduction potentials to calculate the value
write the lewis symbol for hydrogen sulfide, distributing the remaining valence electrons so that the hydrogen atoms are in accordance with the duet rule and the sulfur atom is in accordance with the octet rule.
NaOH + CO2 -→ Na2CO3 + H2O . If the average human body discharges 536 g of CO2 per day, how much NaOH is needed each day for each person in the spacecraft?
Describe the nature and characteristics of PCB's. Why are they of importance to an EH&S or FS professional who encounters them when coming upon an incident scene where they are present? What precautions, or actions, should the EH&S or FS professio..
The total volume of hydrogen needed to fill the Hindenberg was 2.0x10^8 L at 1.00 atm and 25 C. How many kilojoules of energy were evolved when it burned?
A 585 g piece of copper tubing is heated to 97.2°C and placed in an insulated vessel containing 51.0 g of water at 26.0°C.
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