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What is the molar concentration of sodium ions in a solution in which 75.02 g of sodium sulfate and 102.75 g of sodium phosphate were completely dissolved in 500.00 mL of water and brought to a fina
There is no product D being formed when substrate A is added. Adding product B does not correct the problem, but adding product C does. Where does the problem in the biochemical pathway lie?
Suppose that 194.2 J of heat energy is required to completely vaporize 3.3 g of a pure liquid. If the molar mass of the liquid is 91.92 g/mol, what is the molar enthalpy of vaporization of the liqui
If a compressive force of 1,850.549 lbf is applied on a cross-section of a 20ft aluminum rod with a radius of 6.826mm, what will be the change in length and the final length of the rod due to the
What is the molar solubility of Q in a solution of NaX prepared by dissolving 1.98g of NaX in 150. mL of water?
Ben lets his toys slide down a 1.5m ramp at a 45 degree angle in a wooden box. The box starts out at rest, and speeds up as it goes down. Ben finds the acceleration to be 3.4 m/s^2. What is the coef
John carries one heavy box and kicks the other box so that it slides for a little bit and then stops, and he continues this until he reaches his destination. His kicks to the box have an accelerati
What is the net work done on the block while it is moving from point a to point b? Explain how you arrived at your answer. The block is moving at a constant velocity with a constant force in the pre
Say the electrical company needs to step down the voltage from 7200V RMS in the power line behind your house to the required 120V RMS. If they have a transformer with 1000 coil loops on the primary
A parallel plate capacitor has a capacitance of 10mF and its charge with a 20V power supply. The power supply is then removed and a dielectric of dielectric constand 4 is sused to fill the space bet
Brooks City has three consolidated high schools, each with a capacity of 1,200 students. THe school board has partitioned the city into five busing districts north, south, east, west and central eac
Assume that the heat lost by the surface is gained by ethyl chloride. What enthalpies must you consider if you were to calculate the final temperature of the surface?
A 0.5220 g sample of an unknown monoprotic acid was titrated with 9.98×10?2 M NaOH. The equivalence point of the titration occurs at 23.70 mL. Determine the molar mass of the unknown acid.
How much heat is released when 105 grams of steam at 100.0 degrees celsius is cooled to ice at -15.0 degrees celsius? The enthalpy of vaporization of water is 40.67 kJ/mol.
A gas mixture is made by combining 8.9 g each of Ar, Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 21.10 L. What is molar mass of the unknown gas?
A standard solution of sodium hydroxide has a molar concentration of 0.128M. You use 25.00ml of a solution of hydrochloric acid and this requires 32.75ml of the standardized sodium hydroxide solutio
Complete and balance the following equations, and identify the oxidizing and reducing agents. (Recall that O atoms in hydrogen peroxide, H2O2, have an atypical oxidation state.)
Discuss the solubility (in water) of some organic compounds e.g Compare alcohols, alkanes and hetones or carboxylic acid and the different types of intermolecular bonding.
What is the hydronium ion concentration and the pH of a solution formed when 30mL of 0.30M HNO3 is titrated with 43mL of 0.20M NaOH at 25C?
To pre-form the density gradient, a volume of 9.5 ml of a 60% solution of percoll was added to two polypropylene centrifuge tubes and balanced accurately.
If 10.7 mL of .110 M NaOH is required to reach the equivalence point of a solution of citric acid, how many mL of NaOH are required to completely neutralized this solution?
Write three orbital designations that would be incorrect and explain why each is incorrect. For example, 1p would be an incorrect orbital designation because there is no p sub-shell in the first orb
If a formic acid/formate buffer is 0.031 M in formic acid and has a pH of 3.91, what is the molar concentration of the formate ion? The pKa of formic acid is 3.75.
What is the chemical formula of the product formed from the reaction of calcium chloride and potassium oxalate? Make sure to include the correct number of waters of hydration.
You must determine the amount of acetic acid and sodium acetate required. The Ka of acetic acid is 1.8 X 10^-5. Show the calculations for the preparation of 100 mL of an acetic acid - sodium acetate