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Consider the unit cells shown here for three different structures that are commonly observed for metallic elements.
(a) Which structure(s) corresponds to the densest packing of atoms?
(b) Which structure(s) corresponds to the least dense packing of atoms?
Barium sulfate,BaSO4 , is used in medical imaging of the gastrointestinal tract because it is opaque to X rays. A barium sulfate solution, sometimes called a cocktail, is ingested by the patient
NH3 can react with BF3, forming NH3¾BF3. In this reaction, 1) NH3 acts as a Brønsted base, accepting a proton from the BF3 molecule. 2) NH3 acts as a Lewis base, donating a proton to the BF3 molecule
The calorimeter constant is 27.8J/°C. Write the balanced chemical equation and calculate the amount of heat released by the experiment
Nicotine is a poisonous, addictive compound found in tobacco. A sample of nicotine contains 6.16 mmol C, 8.56 mmol H, and 1.23 mmol N ( mmol = millimol = 10-3 mol).
The decomposition of N2O5 yields NO2 + NO3 proceeds as far as a first order reaction with a half life of 30 seconds at a certain temperature. If the initial concentration {N2O5}0=.4 M define what is the concentration after 120 seconds
Imagine that a chemist has cyclohexanone, triphenylphosphine, butyllithium, and 1-bromopropane. Draw the chemical structure of the alkene that you could make using these reagents in a synthesis that involves the Wittig reaction.
Diagram the path that light travels through a spectrophotometer. Utilize flow chart format. Comprise white light source, measuring phototube, sample compartment and monochrometer.
Problem- The solubility of CuCO3 is measured and found to be 1.88E-3 g/L. Use this information to calculate a Ksp value for copper(II) carbonate.
The explosive, TNT, is composed of 37.0% carbon, 2.2% hydrogen, 18.5% nitrogen and the rest oxygen. if the molar mass of TNT is 227 g/mol, what is the empirical and molecular formula for TNT?
Problem- 25 grams of a salt with a molar mass of 175 g/mol are dissolved in 385 g of acetic acid. The boiling point of the solution is 119.5 degrees C. The boiling point of pure acetic acid is 118.1 C. and kb acetic acid = 3.07 C/m. What is the va..
How to calculate the volume of 1.5M aqueous pottasium hydroxide require to react completly with 2g of benzoic acid and extract the solution twice using the volume calculated?
What are the 6 strongest acids and what are the 6 strongest bases in general chemistry?
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