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What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M methylamine, CH3NH2, with 25.00 mL of 0.10 M methylammonium chloride, CH3NH3Cl?
An unknown compound Y, C10H16, can absorb 2 equivalents of hydrogen gas to give 1-isopropyl-4-methylcyclohexane. The ozonization products are shown below. What is the structure of Y?
A student weighs out 10,000 grams of MgSO4 from a bottle. after heating, the sample was 5.720 g the chemical reaction that occurs upon heat a hydrate is: MgSO4 7H2O? How much water in grams was actu
An aqueous solution that 2.10 in is slowly added from a buret to an aqueous solution that is 1.40×10-2 in and 0.250 in . When the second ion begins to precipitate, what is the remaining concen
Calculate the wavelength of the photon emitted when the hydrogen atom undergoes a transition from n = 5 to n = 3. (R = 1.096776 × 107 m-1).
The following question refers to the following system: 3.5 x 102 mL of 3.2 M Pb(NO3)2 and 2.0 x 102 mL of 0.020 M NaCl are added together. Ksp for the lead chloride is 1.6 x 10-5. Determine the equ
A 1.5g sample of unknown alkali metal carbonate was dissolved in water, and 31.10mL of 0.350M CaCl2 was required to precipitate all the carbonate ions as CaCO3. Give the name and formula of the unkn
A student titrates a soln containing 0.254 g of a monoprotic acid in 35 ml of water. the student reaches the endpoint after adding 18.35 ml of 0.107 M NaOH. How many moles of the acid are present i
The majority of cholesterol use in the body is for
The first and second ionization constants of H2CO3 are 4.2×10-7 and 4.8×10-11. Calculate the concentrations of H+ ion, HCO3-, CO32- and undissociated H2CO3 in a 0.080 M H2CO3 solution.
a compound is determine to contain 4.36g phosphorus and 5.64g oxygen and a molar mass of 284 g/mol. Determine the empirical and molecular formula of this compound.
The polystyrene coffee cup calorimeter is very good insulator.However, it still absorbs a small amount of heat if the system is above room temperature.How does this affect the specific heat of the
What are possible sources of error and their possible effect on the equilibrium constant value in determination of equilibrium constant experiment.
A 115 mL sample of a 11.0 M ethylene glycol (rm C_2H_6O_2) solution is diluted to 1.40 L. What is the freezing point of the final solution? (Assume a density of 1.06 g/mL for the final solution.)
Calculate the pH of a buffer formed by mixing 85 ml of 0.12 M lactic acid with 95 ml of 0.15 M sodium lactate.
Explain how the solution containing equimolar amounts of HCHCO2 and KCHO2 resist change in pH when strong acid is added and also when strong base is added?
If 6.46 L of gaseous ethanol reacts with 16.1 L O2, what is the maximum volume of gaseous carbon dioxde produced
Determine the Ka of an acid whose 0.294 M solution has a pH of 2.80
A piston has an external pressure of 13.0 atm. How much work has been done in joules if the cylinder goes from volume of 0.150 liters to 0.570 liters?
Calculate the concentrations of all species in a 1.29 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
The value of Kp for Br2(g)............2Br(g) at 700 K is 2.9e-5.At 500 K value of Kp be higher,lower or the same as that at 700K.Explain ? first predict whether this reaction is endothermic or exot
Calculate the number of moles of gas in a 3.24 L basketball inflated to a total pressure of 24.3 psi (pounds per square inch) at room temperature (25 degrees Celsius).
If the formula for potassium chlorate is KClO3 and the formula for magnesium fluoride is MgF2, then what is the formula for magnesium chlorate?
0.5585g of ferrous ammonium sulfate hexahydrate requires 21.45 ml of KMnO4 solution to reach a pink endpoint.What is the molarity of the KMnO4 solution?