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A mass of 0.750 g calcium chloride is diluted with 975 g H2O. What is the chloride ion concentration (in ppm)?
Draw the molecular orbital diagram for the acetylide anion (C22-). Assume that order of the n=2 molecular orbitals in increasing energy is
A researcher studying the nutritional value of a new candy places a 4.20-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.71 °C
Calculate the amount of heat energy in joules required to heat 50.0g of each substance from 25.0 c to 37.0 c
the reactants in a Diels-Alder reaction are used in a 1:1 ratio. In this experiment, one reagent is used in excess. Which reagent is in excess, and why is it important that so much of it be used?
Given that the density of chloroform is 1.48 g/mL, and the molar mass is 119.38 g/mol, how many moles of chloroform did the student measure?
Your Discussion should address at least the following points: 1. What is the structure of each isomer? 2. Which ligands are observed in the IR spectra of the four complexes which you have prepared? What are the symmetries of the ligands in each co..
Describe clearly why a single indicator solution in only useful for measuring pH over a rather narrow range. Use a specific indicator of solution
Calculate the pH of a buffer composed of .50 M formic acid (HCO2H) and .70 M sodium formate (HCO2-Na+) before and after the addition of 10.0 ml of 1.0 M HCL
Titration of an oxalate sample gave the following percentages of percent oxalate: 12.28%, 12.54%, and 12.24%. Calculate the average and the standard deviation.
After the reaction was completed. The solution was back titrated with a NaOH solution (33.50 mL of 0.1500 M).Calculated the Molecular Mass of MCO3. Determine what is this sample: CaCO3 ; MgCO3; or BaCO3 ?
a .50 g sample of vegetable oil is placed in a calorimeter when the sample is burned 18.9kJ are given off what is the caloric value of the oil.
When a 3.00-g sample of KCl is dissolved in water in a calorimeter that has a total heat capacity of 2.472 kJ·K-1, the temperature decreases by 0.280 K. Calculate the molar heat of solution of KCl in kJ/mol
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