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A buffer contains 0.40M base, B, and 0.25M of its conjugate acid, BH+, and has a pH = 8.88. What is the pH after 0.0020mol of HCl is added to 0.25L of this solution?
Addition of NH3 precipitated Fe2O3*xH2O, which was ignited to give 0.264g of Fe2O3 (FM 159.69). What is the average mass of Fe2SO4*7H2O (FM 278.01) in each tablet?
Splitting patterns and integrations may be used more than once, or not at all, as needed. Likewise, some bins might remain blank. Note that peak heights are arbitrary and do not indicate proton integrations.
What is the wavelength of these radio transmissions in meters (m)? Once you have your answer, determine the log (base 10) of it and enter that value to 3 decimal places.
Solid aluminum reacts with aq H2 SO4 to form H2 gas and aluminum sulfate. when a sample of Al reacts, 425 mL of H2 gas is produced at 24 degree celsius at a press of 744 mmHg. How man grams of Al reacted?
an aerosol spray can with a volume of 270 ml contains 3.2 g of propane gas propellant. what is the pressure in the can at 20 c.
A solution containing an unknown quantity of A plus 930 nM B gave a relative detector response (peak area of A)/(peak area of B) = 1.21. Find the concentration of A in the unknown.
A fluid has a density of 4.25 g/mL. If you need to acquire 5.0 g of the fluid, how much volume will you need to draw?
Compute the pH of the titration solution before any acid is added, when the titration is 1.00 mL short of the equivalence point, when the titration is at the equivalence point, and when the titration is 1.00 mL past the equivalence point.
What is the sum of the simplest whole number ratio coefficients in the balanced chemical equation for complete combustion of C3H8.
When 1.00 g of urea (CO(NH2)2) is dissolved in 200g of solvent A, the freezing point is lowered by 0.250C. When 1.50 g of the nonelectrolyte Y is dissolved in 125 g of the same solvent
what volume of hydrogen at STP is produced from the reaction of 50.0g of Mg and the equivalent of 75g of HCl?
A titanium bicycle frame contains the same amount of titanium as a titanium cube measuring 6.6cm on a side. 1) Use the density of titanium to calculate the mass in kilograms of titanium in the frame.
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