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Calculate the pH of (a) a solution that is 0.40 M CH3COOH and 0.20 M CH3COONa. (b) a 0.40 M CH3COOHsolution. Determine the pH of a saturated zinc hydroxide solution
Determine the numbers of grams of antifreeze must be dissolved in the 300 g of water in order to reduce the freezing point of the water to-13.02o C under 1 atm pressure (Kf:1.86 o C/m
What facts regarding solution of the quadratic equation can be reduced from discriminant of quadratic formula? Or we can say, what different kinds of solutions are possible depending on value of dis
Using iron and chromium as examples, explain the four chemical or physical properties in which the transition elements and their compounds differ from those of aluminum, magnesium and their
Determine the concentrations of Cu2+,Cu(NH3)42+, and NH3 at equilibrium if 2.50 g of CuSO4 are dissolved in the 9.0 X102 mL of 0.30 M NH3,. Explain in detail.
Calculate the molar mass of the acid when a 0.2688-g sample of a monoprotic acid neutralizes the 16.4 mL of0.8133 M KOH solution.
The synthesis of aluminum oxide is exothermic to the extent of 1672KJ/mol of oxide and the heat of formation of ferric oxide is-836 KJ/mol of ferric oxide.
The culture of bacteria obeys law of unihibited growth. If 500 bacteria are present initially and there are 800 after one hour, how many will be there in culture after five hours.
What are the molarity and the molality of sucrose in this solution when a 10.0% aqueous solution of sucrose (C12H22O11) by mass has a density of 1.040 g/ml.
Determine the numbers of oxygen atoms are in the 53.5 g of calcium phosphate? Express your answer to the correct number of significant figures. Describe whether you would expect the same number of
At 910 mmHg and 36 oC a cylinder with a movable piston contains a 1024 ml sample of argon gas, determine the numbers of moles of gas are in the sample? Make sure to express the answer to the co
By assuming the complete reaction, determine what volume of .200 mol dm-3 HCl (aq) is needed to neutralize the 25.0cm 3 of .200 mol dm-3 Ba(OH)2
How can draw the structural formula and a sketch of the proton nmr spectrum of 3-bromo-2, 3-dimethylpentane, showing approximate chemical shifts and signal splitting. Illustrates the multiplic
In the procedure for the synthesis of 1-bromobutane some water was added to the initial reaction mixture. Discuss how might the yield of bromobutane be affected if the water were not added and expla
Compute the volume of the unit cell for Co if the cobalt has a HCP structure, atomic radius of 0.1253 nm, and the ac/a ratio of 1.623. Explain how does c/a relate to volume? And how do derive
Determine the numbers of milliliters of a .250 M KMnO4 solution are required to react totally with the 3.225 G of oxalic acid?
Determine coordinates of points of intercection of the graphs algebraically. Illustrate steps to support answer. Write equation of tangent to graph f(x) at its relative minimum point.
What percent of guanine would be in this sample if a sample of Dna were found to contain the 20 percent cytosine. Explain in detail.
By condensing 4.00L of a gas a solution is prepared, calculated at the 27 degrees Celsius and 748 mmHg pressures, into the 58.0g of benzene. Estimate the freezing point of the solution.
Identify the gram atomic mass of the silver using the information obtained in the calculation step. The mass of Ag= 1.57g of Ag divided by the mol of Ag= .22 mol of Ag which equals 71g/mol o Ag.
2-hexyne and cyclohexene both have the molecular formula C6H10. Discuss how would you use infrared spectroscopy to differentiate among the two compounds?
The profit in dollars in making x- items of some commodity is provided by equation P = - 2 x^2 + 2400 x - 10000. How many items must be made to break even?
Illustrate the two, electron dot structures for it. Use a set of curved arrows to demonstrate how the electrons flow to move the negative charge from one oxygen to the other when you treat acetic a
Identify the minimum film thickness they would result if the is fluid were applied to a vertical wall and if the critical stress for a Bingham fluid is 0.058 bound force per ft2 and th
Determine the numbers of moles Ag+ added in step 3of the procedure is in excess of the moles of chloride? Suppose that you weigh 0.4000g of sample that is pure NaCl and subject it to the proced