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A solid material is known to enclose potassium biphthalate, KC8H5O4 and other inert materials. A 3.025 gram sample of this material is dissolved in 100mL water as well as titrated with 0.0875 M potassium hydroxide. It takes 23.78mL of KOH solution to reach the end point. Explain how many moles of KOH were used in the titration?
If a 1.55g sample of zinc is heated with excess sulfur to form 2.31g of zinc sulfide, calculate the mass of sulfur used.
Explain how are gases affected under different atmospheric pressures. In what ways might this affect you if you are moving to a different elevation
What is the dew point temperature of a gas mixture that is 30% n-hexane, 30% in-heptane, and 40% air at 1 atm? What is the composition of the first "drop"?
If 6.46 L of gaseous ethanol reacts with 16.1 L O2, what is the maximum volume of gaseous carbon dioxde produced.
22.5ml of .383 molar H2SO4 is required to completely neutralize 20ml of KOH solution. What is the molarity of the KOH solution?
4HCl(aq)+1MnO2(s)->1MnCl2(aq)+2H2O(g)+1Cl2(g) When 1.22 mole of HCl reacts with excess MnO2, how many moles of Cl2 form. and How many grams of Cl2 form
Draw the major and minor resonance structure for the carbonate ion (CO3^-2). Include any formal charges, Indicate which are the major resonance structures and why.
Is the reaction of iodoethane with sodium saccharin a SN1 or SN2 reaction. Explain why
What volume of hydrogen gas measured at STp would be produced if 12.2 mL of 3.4 M HCl reacted with an exces amount of zinc? Zn + HCl --> H2 + ZnCl2
In the Lewis structure of PCl3, how many bonds and how many lone pairs are on the central atom?
You make 1.00 L of a buffered solution (pH = 4.00) by mixing acetic acid and sodium acetate. You have 1.00 M solutions of each component of the buffered solution. What volume of each solution do you mix to make such a buffered solution
Calculate the density and radius of the ball bearing (volume of a sphere of radius r is 4/3pi r^3).
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