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The density of aluminum is determined to be 2.680 g/cm3 at 125 degrees celcius. What is the length of one side of a 1 kg cube of aluminum at 640 degrees celcius.
The mixture was stirred, causing all of the sample to dissolve. The excess HCl in the solution required 38.4 mL of 0.164 M NaOH for complete neutralization in a titration. What was the molecular for
Choose the answer in which the oxides are arranged in order of increasing acidity (least acidic compound listed first).
How many grams of solid calcium hydroxide Ca(OH)2 are required to prepare 200 mL of a 0.05 M solution. Molar mass (formula weight) of Ca = 40.1 g/mol, O = 16.0 g/mol, and H = 1.01 g/mol.
How many milliliters of 0.10 M HCl must be added to 44.7 mL of 0.40 M HCl to give a final solution that has a molarity of 0.25 M
A mixture consists of lithium carbonate (Li2CO3) and potassium carbonate (K2CO3). These react with hydrochloric acid as follows.
Using the Henderson-Hasselbalch Equation calculate the PH of a solution containing acetic acid and ten time as much sodium acetate. What is the PH of a solution containing sodium acetate and ten tim
Tyrosine was loaded onto an anion-exchange column and completely washed with a pH 6.5 buffer. Which amino acid came off the column first? A) Arg B) Lys C) Tyr D) His E) None, all would be retained o
Predict the products of the following reactions. Complete and balance the equations. If the names are given, write the correct formula for the reactants.
The endpoint of a titration is not exactly the same as an equivalence point. Why does the titration still work to use the endpoint
Given that vinegar is 5% acetic acid by weight, estimate the percentage of vinegar in the foods. Assume that vinegar is 1.05 g/ml.
Write molecular, complete ionic, and net ionic equations for the reactions that occur , if any, when solutions of the following substances are mixed
How to convert the moles of KHP to moles of NaOH, using the equation HKC8H4O4 + NaOH = NaKC8H4O4 + H2O. If the moles of KHP are .002506 mol.
The flask is not only completely filled with vapor, but some liquid also remains in the bottom of the flask when it is removed from the hot water bath and cooled in part B3. How will this oversight
the outside of the flask is dried before its mass is measured. 1) Will the mass of the vapor in the flask be too high too low, or unaffected. 2) Will the molar mass of vapor in the flask be reported
A mixture containing 3.7 moles of NO and 0.88 mole of CO2 was allowed to react in a flask at a certain temp according to the equation
How could a 13c NMR spectrum be used to distinguish between the structures for 9-fluorenone and 9-hydroxyfluorene
An equilibrium mixture contains 0.450 mol of each of the products (carbon dioxide and hydrogen gas) and .200 mol of each of the reactants (carbon monoxide and water vapor) in a 1.00 L container.
What information does a chemist obtain from the mass spectrum of a compound?
4.60 mol of solid A wasplaces in a sealed 1.00 L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.10M where it remained constant.
At 450 K the equilibrium concentrations for the following reaction was measured and used to calculate the kc value of 0.0431. What is the value of Kp for the Reverse reaction under the same conditio
The equilibrium constant (Kc) for the formation of nitrosyl chloride, an orange yellow compound, from nitric oxide and molecular chlorine
A mixture of CuSO4 * 5H2o and MgSO4 * 7H2O is heated until all water is lost. If 5.020g of the mixture gives 2.988g of the anhydrous salts, what is the percent by mass of CuSO4 * 5H2O in the mixture
After he cleaned up the mess, he looked around the baby's changing table for remedies for this horrible rash, but he could not find anything. As he was about to panic, he remembered some useful acid
A student made a bottle of 6 M NaCl solution in the morning and then stored it in the refrigerator. In the afternoon, he took out the bottle and found NaCl crystals at the bottom of the bottle. Can