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Why is it best to cool the crucible and lid (and sample) in a desiccator rather than on the laboratory bench?
An unknown gas having a mass of 2.041 g occupies a volume of 1.15 liters at 0.974 atm and 20 degrees Celcius. Calculate the molar mass of the unknown gas.
What is the concentration of the Pb(NO3)2 in the voltaic cell pictured above when Ecell=0.524V at room temperature?
M HNO3 is mixed with 439 mL NaOH with pH=13.97. What is the pH of the resulting solution?
what is the pH solution if 100 mL of the solution is .15 M acetic acid CH3CO2H and contains 1.56g of sodium acetate, CH3CO2Na? Ka=1.8x10^-5
sodium bisulfite is a reducing agent. write a balanced oxidation reduction reaction equation for the reaction that occurs
The lower flammability limit (LFL) for a gas is the minimum concentration of the gas, in air, below which there is too little fuel to support combustion.
Lyzozyme(The protein) unfolds at a transition temperature of 75.5 degree celsius, the standard enthalpy of transition = 509 kJ/mol. Compute the entropy of unfolding of this protein at the temperature of twenty five degree celsius
How much potassium nitrate has to dissolve in water to absorb 114 kJ of heat?
When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. How many grams of calcium chloride will be produced when 27.0 g of calcium carbonate are combined
Calculate (a) the mole fraction of the solute, (b) the number of moles of solute in the solution, and (c) the molecular mass of the solute.
The solubility of AgCrO4 is several times greater than that of AgCl, so the red precipitate cannot form until all the chloride ions have effectively been removed from the solution.
Calculate the mean and standard deviation of w/v percentage of acetic acid and the 95% confidence interval for the mean. Calcium in a mineral was analyzed five times by each of two methods
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