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A. Why do the group 8A elements rarely react with other elements?
B. Why do we no longer accept Dalton"s statement that all atoms of an element must be exactly alike?
A test tube containing a mixture of KCl, KClO3, and MnO2 having a total weight of 23.584 g was heated to compose the KClO3. After heating, the mass was found to be 22.347 g.
In acid based titration, 33.65mL of an 0.148 M M HCL solution were required to neutralize 25.00 mL of a NaOH solution . What is the molarity of the NaOH solution
A boiler is used to heat steam at a brewery to be used in various applications such as heating water to brew the beer and sanitizing the brewing tanks. 81.0% of the heat produced by the boiler is used to create saturated steam at 18.0 bars (absolu..
A 10.00mL aliquot of a weak base is titrated with HCL. The equivalence point is reached after 17.21mL of 0.4332 mol/L HCL has been added. The pH is equal to 10.03 after 5.00mL of HCL was added. Determine
1. what is the molality of a solution that contains 3.0g urea molecular weight 60 amu in 100g of benzene?2. calculate
After allowing circulatory equilibrium to be established, a 0.20-mL sample of blood is found to have an activity of 20. counts per second. Calculate the blood volume of the animal.
Calculate the value of the equilibrium constant for the reaction that occurs when solid sodium oxalate is dissolved in water.
The products of a specific reaction and the side products or impurities? Explain specifically what would be observed for this pair of compounds: 4-bromoacetanilide and 2-bromoacetanilide
A student has three gas samples of the same volume. All the gases are at the standard temperature and pressure (273 K and 1.0 atm). If the three gases are O2, CO2, NH3, which sample contains the largest number of atoms
What is the minimum uncertainty in the speed of an electron confi ned to within a lead atom of diameter 350. pm? Model the atom as a one-dimensional box with a length equal to the diameter of the actual atom.
A solution was prepared by dissolving 25.0 g of KCl in 225 g of water. Calculate the mass percent of KCl in the solution.
At room temperature 22.0 C the vapor pressure of benzene is 0.302 atm and the vapor pressure of hexane is 0.374 atm. What is the total vapor pressure at room temperature for a 2:1 mixture of hexane to benzene
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