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Silver carbonate will decompose when heated as shown in the unbalanced chemical equation below. An impure sample containing 84.1 % Ag2CO3 by mass is heated to produce 9.02 g of oxygen (O2). Calculate the mass of the impure sample used in the reaction. Ag2CO3(s) ? Ag(s) + CO2(g) + O2(g)
A 21.496 g sample of magnesium is burned in air to form magnesium oxide and magnesium nitride. when the products are treated with water, 2.813 g of gaseous ammonia are generated.
How much heat is required to raise the temperature of a 464g of lead from -20.0C to 219C
Assume an average minimum daily requirement for calcium is 1150 mg. Calculate what percentage of your daily requirements could be met by drinking 1.0L of your local water.
How many gm of dry NH4Cl need to be combined to 2.30L of a 0.300M solution of NH3, to prepare a buffer solution of pH 8.85.
Milk spoils about 5x as fast at 300 K as it does at 250 K. What is the apparent activation barrier for the "milk spoiling" reaction
How many grams of IBr were initially put into the vessel and determine the equilibrium constant - How many grams of IBr were initially put into the vessel?
Examining the experimental setup, the students finds an air pocket between the stopper at one end of the U-tube and the electrolyte solution inside the tube
He finds that the total pressure at equilibrium is 40% greater than it was originally. What is Kc for this reaction?
Calculate the initial effusion rate. If this rate continued how much time would pass until the pressure dropped to 0.90 bar? (actually the rate changes with pressure- indicated why using the equations). assume values for nitrogen
The Environmental Protection Agency has estimated that 119 tons of mercury are currently emitted to Earth's atmosphere annually due to human activities
What is the wavelength of a photon (in nm) of light emitted resulting from an electron in a hydrogen atomundergoing a transition from a n=5 to and n=1 electronic orbital
derive the irreducible representations for the normal vibrations of XeF4 and determine which are IR active, which are Raman active
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