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A helium-filled weather balloon has a volume of 714 L at 23 oC and 759 mmHg. It is released and rises to an altitude of 4.80 km, where the pressure is 495 mm Hg and the temperature is -9oC. what is the volume of the balloon at this altitude.
A piece of metal of mass 22 g at 92C is placed in a calorimeter containing 53.7 g of water at 21C. The final temperature of the mixture is 55.3C. What is the specific heat capacity of the metal?
The heat fusion for water is 80. cal/g. How many calories of heat are released when 20 g of water is at 0 C is frozen to ice ?
Hydrogen and iodine gases react to form hydrogen iodide gas. H2(g) + I2(g) → 2 HI(g) At a certain temperature and pressure 0.70 L of H2 reacts with 0.70 L of I2.
What is the molarity of a HCl solution if the reaction of 200 mL of the HCl solution with excess CaCO3 produces 14.0 L of CO2 gas at 725 mmHg at 18 degree celsius.
What is the main structural feature of the azo dyes that causes them to be colored compounds?
If a reaction mixture initially contains 0.159 M SO2Cl2 , what is the equilibrium concentration of Cl2 at 227 C?
A 33.0-g sample of an alloy at 93.0°C is placed into 258 g of water at 22.0°C in an insulated coffee cup. Assume that no heat is absorbed by the cup. If the final temperature of the system is 31.1°C
If the surface area of a human body is 16,100 square centimeters, what is the total weight of the atmosphere on a human body
How many kilograms of sodium fluoride would be needed to treat a 8.00 x 10^7 gal reservoir
Gas cylinder A has a volume of 48.2 L and contains N2(g) at 8.35 atm at 25 ºC. Gas cylinder B, of unknown volume, contains He(g) at 9.50 atm at 25 ºC
A solution containing 100g of unknown liquid and 900g water has a freezing point of -3.33C. Given Kf=1.86C/m for water, determine the molecular weight of the unknown liquid and express your answer in g/mol.
Each of 2 front tire in the car is filled with a different gas. One tire contains 116g of helium, another tire has 160g of unknown gas. How many times heavier is a molecule of the unkown gas than an atom of helium.
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