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Problem- A compound is composed of only C and I, It contains 5.935 % C by mass and has a molar mass of 809.44 g/mol. What is its molecular formula?
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When 4.0 g of sulfur is burnt in excess oxygen, 40 KJ of heat is evolved. What is the enthalpy change for the combustion of sulfur?
Calculate E, q, and w if 8.00 moles of CO2 (g) reacts with excess nitrogen gas according to the following reaction at 25°C and 1.00 atm:
By comparison, what would it cost to heat the home using a ground source heating system with an electrically powered heat pump that has a COP of 5.0?
Calculate the pH of a solution formed by mixing 250.0 mL of 0.15 M NH4Cl with 100.0 mL of 0.20 M NH3. The Kb for NH3 is 1.8 x 10-5.
Determine the value of Faraday used If the electrolysis was carried out for eighty minutes with a current of four amperes flowing
A proton in a linear accelerator has a de Broglie wavelength of 144 pm. what is the speed of the proton?
What is the molar solubility of CaF2 in 0.10 M NaF solution at 25°C? The Ksp for CaF2 is 1.5 x 10^-10
A precipitate resulted when the solution was treated with 6M sodium hydroxide. The precipitate dissolved in ammonia, giving a royal blue solution
Arrange the following gases, at the temperature indicated, in order of increasing rms speed of the particles: helium at 100 degrees C, neon at 50 degrees C, and argon at 0 degrees C.
What is the mass of a glucose solution that fills a 1.00 {\rm L} intravenous bottle if the density of the glucose solution is 1.15 g/mL?
A 300.0-mL saturated solution of gold (II) phosphate, contains 0.31 grams of dissolved salt. a. Write an equilibrium expression for the solubility product constant.
The formation constant Kf for the complex ion Zn(OH)42- is 2.8 1015. What is the concentration of zinc ion, Zn2+, in a solution that is initially 0.50 M in Zn(OH)42-
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