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An unknown metal of density 7.65 g/cm^3 occurs in a face centered cubic unit cell. The radius of the atom is 126 pm. What is the metal's atomic mass and what is the metal?
Calculate the fraction of atoms in a sample of argon gas at 360. K that have an energy of 14.0 kJ or greater.
What is the value of Ksp for Ag2SO4 if 5.40 g is soluble in 1.00 L of water?
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places.
When iron chloride FeCl3 is dissolved in water the solution becomes acidic. The preparation of the Fe(NO3)3 solution and the KSCN solution used 0.5 M HNO3 as the solvent instead of water. Explain why this was done. Hint: Consider Le Chatelier's Pr..
Calculate the mass percent composition of carbon in each the following carbon compounds. Express your answer using 4 significant figures. C4H10 C6H10 C8H13O5N
The Apparatus shown consists of three bulbs connected by stopcocks. What is the pressure inside the system when the stopcocks are opened?
Suppose that an excess of propane, C3H8 burns in 320 g of O2. How many moles of H2O will be formed
A mixture of liquid hydrogen and water (99.99 mole %) is in equilibrium with hydrogen gas and water vapor at 25°C. Assuming ideal solution behavior, calculate the system pressure and the molar composition of the gas phase.
What is the molarity of a solution of vinegar that is 5.00 % by mass acetic acid (CH3CO2H) and has a density of 1.01 g/mL.
A 53.6 gram sample of an unknown substance contains 11.5 grams of carbon. What is the percent by mass of carbon in the compound?
The electrolysis of molten A12O3 at 980 ºC is used to produce metallic aluminum. A current of 658 A is used in the electrolysis cell. What is the rate of formation of aluminum, in kilograms per hour
Calculate the expectation values for a particle in the state n = 5 moving in a one-dimensional box of length 2.48×10^(?10)m If someone can just help me out with the set up of the problem thatd be helpful.
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