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Problem- There are two stable isotopes of copper. Their masses are 62.9296 amu and 64.9278 amu. If the average atomic mass of copper is 63.55 amu, what is the natural substance of the lighter isotope? Note: It is asking for the natural substance as a decimal!
Please take care to reply the question as mark are evenly granted for each point
calculate the percentage of empty space in 1 mole of water at 25 c. obbtain the density from the experiment" some measurements of mass and volume."
Propionic acid and methyl acetate are isomers. Which has the higher boiling point and why? Which one would have the greater Rf value on TLC? Why
The kidneys function to eliminate ammonia from the blood. Based on the pK value, what is the molecular form that predominates in the blood? Could this molecule easily diffuse through th ehydrophobic lipid membrane of a kidney cell? Explain.
Problem- A 0.785 g sample of a diatomic element occupies 248 mL at STP. What are the molar mass and formula of the element
A particular metallic element, M, has a heat capacity of 0.36 J * g^-1 * K^-1. It forms an oxide that contains 2.90 g of M per gram of oxygen. (a) Using the law of Dulong and Petit (Cp x M = 25 J per mole per Kelvin), estimate the molar mass of th..
Calculate the 'size' of a hydrogen atom in its ground state according to this definition. Go on to explore how the 'size' varies as the definition is changed to other precentages, and plot your conclusion.
Explain why does CH2Cl2 solvent (lower layer) have higher density than water while non-chlorinated solvents like hexanes and ether (top layer) have lower density than water, i.e. Explain what exactly is it about Cl that causes this difference
A 12.00 ml aliquot of H2SO4 required 62.334 g of this NaOH solution to reach the phenolphtalien end point. Determine the molarity of the sulfuric acid solution
What difference in titrant volume would you except between the end- point and the equivalence point if the only indicator available was diphenylamine sulfuric acid
What problems might we see if we increase the energy of the electron beam. And if we reduce the energy of the electron beam.
When two atoms of 2H (deuterium) are fused to form one atom of 4He (helium), the total energy evolved is 3.83 × 10-12 joules. What is the total change in mass
A 50.0-mL sample of 0.50 M HCl is titrated with 0.50 M NaOH. What is the pH of the solution after 28.0 mL of NaOH have been added to the acid
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