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Determine the molar mass of Freon -11 gas if a sample weighing 0.597 g occupies 100 cm3 at 95 degrees Celsius, and 1,000 mmHg.
suppose the reaction ca3po43h2o4 3caso42h3po4 is carried out starting with 103 g of ca3po42 75 g of h2so4 .how much
what is the concentration of the dye in a solution with a percent transmittance reading of 45.8% at 640 nm
A student added a total of 15.00 mL of 0.5241 M HCl to 1.4881 g to of an unknown which contained CaCO3 (molar mass = 100.09 g/mol). The resulting solution required 12.21 mL of 0.1211 M NaOH to back titrate the excess HCl. What was the percent CaCO..
Explain what is the enthalpy change for the formation of PbO(s) from lead metal and oxygen gas
A certain first-order reaction has a rate constant of 2.30×10-2 s^-1 at 23 C. What is the value of k at 55 C if Ea= 84.0 kj/mol
An unopened soda can has an aqueous CO2 concentration of 0.0506 m at 20 celcius. What is the pressure of CO2 gas in the can
Calculate the change in pH to 0.01 pH units caused by adding 10. mL of 2.63-M NaOH is added to 440. mL of each of the following
Write the complete ionic equation for the reaction that occurs when a few drops of HCl are added to the buffer.
Uranium-235 is an important nuclear fuel. However, the ^235Uisotope is only a very small amount of naturally occurring uranium. Therefore, taking advantage of gas diffusion rates and molecular masses, naturaly occurring uranium(IV) oxide is conver..
If 72.4 kJ of heat is supplied to a 862 g block of metal, the temperature of the metal increases by 9.3°C. Calculate the specific heat capacity of the metal in J/g·°C.
A certain dry mixture contains only three compounds: silver nitrate ( AgNO3), magnesium chloride (MgCl2), and barium nitrate Ba(NO3)2. When 1.253 g of the mixture was added to excess water, 0.114 g of a dry precipitate was recovered by filtration...
How many grams of ice at -9.4 can be completely converted to liquid at 6.2 if the available heat for this process is 5.96×103? For ice, use a specific heat of 2.01 and = 6.01.
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