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The pH of saturated Sr(OH)2(aq) is found to be 13.12. A15.0 mL sample of saturated Sr(OH)2(aq) is diluted to250.0 mL in a volumetric flask. A 15.0 mL sample of the dilutedSr(OH)2(aq) is transferred to
One tyype of electromagnetic radiation has a frequency of 107.1 MHz, another type has a wave length of 2.12x10^-10m and another type of electro magnetic radiation has photons with energy = to 3.97x
If 124 kJ of heat are absorbed in a reaction that forms nitricoxide from nitrogen and oxygen, what mass of NO must have been produced? What mass of N2 was consumed?
At 40 degrees Celsuis, KI has a solubility of 160 grams KI per100 grams of water. How many grams of KI are needed to prepare asaturated solution using 25 grams of water?
What is the net ionic equation for the reaction that occurs when solutions of lead(II) nitrate and ammonium sulfate are combined?
Assuming that the first step of the mechanism is rate determining, predict the rate expression for the overall process. Write the chemical equation for the overall process.
0.300 L of H2 gas collected over water at27oC on a day when the atmospheric pressure was 745torr. What would be the volume of H2 gas at 760 torr after the water vapor was removed? (P H2
You are given 2 burettes: one with 0.10 M acetic acid, one with0.15 M sodium acetate. How much of each would you mix together to produce a total of 20.0 mL of solution with a pH of4.70? (You may not
A chemist prepared a 0.244 M solution of fructose at 25 degrees celsius. At equilibrium it was found that its concentration had decreased to 0.183M. What percentage of fructose was converted to gluc
You find that some sand has mixed in with you melting point sampleof a pure compound. Knowing that sand does not dissolve in your melted compound, what is the effect of the sand on the melting point
A closed system initially containing 0.625 M H2 and 0.285 MBr2 is allowed to reach equilibrium. Analysis of the equilibrium mixture shows that the concentration of HBr is0.324 M at a certain te
What is Delta H degree f for an elements in standard state? What does it mean if thevalues are negative for a givensubstae?
How many coulombs would be required to electroplate 35.0 gramsof chromium by passing an electrical current through a solution containing CrCl3?
A current of 2.50 A was passed through an electrolyticcell containing molten CaCl2 for 4.50 hours. How many moles of calcium metal should be deposited?
What would be its solubility in -.1- M Na2SO4? The diff. is caused by what is called the cmmon ion effects.state what the common ion effect predicts.
When aqueous HCl is added to solid magnesium carbonate, the solid dissolves with bubbling. Write a balanced net-ionic equation that describes this reaction.
At a particular temperature, N2O5 decomposesaccording to a first order rate law with a half life of 3.0seconds. If the initial concentration ofN2O5 is 1.0 x 1016molecules/cm3, what will be t
A 0.1964 g sample of quinone(C6H4O2) is burned in a bombcalorimeter that has a heat capacity of 1.56 kJ/°C. The temperature of the calorimeter increases by 3.2°C. Calculate the energy of co
Calculate the change in Gibbs energy at 37 degrees celcius when the human kidneys secrete 0.275 mole of urea per kilogram of water from blood pllasma to urine if the concentrations of urea inblood p
If a flask contains 0.015 M of CO, 0.021 M of Cl2,and 0.38 M COCl2 at 670 K, calculate the equilibrium constant, KC. Calculate the equilibrium constant KP based on the results obtained in pa
The rate constant for a reaction at 40.0 C is exactly three timesthat at 20.0 C. Calculate the activation energy for the reaction.
Nernst Equation: A test solution contained 2 mL of 0.10 M Ag+. A silver strip was dipped into the test solution, and a cell potential of 0.0592 V was measured against an Ag/Ag+ (1.0M) reference h
If 39.1 g of solid TiO2 and 5.28 g of solid C are reacted stoichiometrically according to the balanced equation, how many grams of solid TiO2 remain?
If 3.14 L of gaseous Cl2 measured at STP and 130 mLof 3.92 M aqueous NaBr are reacted stoichiometrically according tothe balanced equation, how many moles of liquid Br2 are produced?
Some A = 243 Z = 95 Am was present when Earth formed, but it decayed over time. The first steps in this decay are emission of an alpha particle.