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Question- Copper reacts with any oxygen present as an impurity in the ethylene used to make polyethylene. The copper is regenerated when hot H2 reduces the copper(II) oxide, forming the pure metal and H2O. The volume of H2 at 765 Torr and 225 oC needed to reduce 35.5 g of copper(II) oxide is
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prepare 10 ml of solution that represents a 4 fold dilution of the stock solution
Problem- If fuel concentration (mol/m^3) vs. time behavior can be represented by the equation [C2H6] = 2.75*10^(-7) Exp(-3170t), whereas the mixing time is of the order of 0.01 ms, the rate -determining step in ethane combustion is the chemical re..
Calculate the energy (J) of the photon emitted when an electron in the hydrogen atom falls from n=6 to n=1. Use 2.178 x 10-18 J for the constant in the Bohr equation.
Calculate the pH of 0.103 M phosphoric acid (H3PO4, a triprotic acid). Ka1 = 7.5 x 10^-3, Ka2 = 6.2 x 10^-8, and Ka3 = 4.8 x 10^-13.
Draw both chair forms of (1S, 3R)-1-bromo-3-fluorocyclohexane. Circle the most stable conformer
To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 12.9 g, and its initial temperature is -13.9 °C. The water resulting from the melted ice reaches the temperature of your skin,
Explain the difference between accuracy and precision, as it pertains to experimental data. The best way to do so is to define
If an air bubble was initially in the buret tip but was dispensed during the back titration of the unreacted HCl. As a result of this technique error
A 13.00 g sample of an ionic compound NaA, where A- is the anion of a weak acid, was dissolved in enough water to make 100.0 mL of solution and was then titrated with 0.100 M HCl. After 550.0 mL of HCl was added, the pH was 5.00.
Which compounds reacted only with AgNo3 in ethanol. Why. Did any compounds appear not to react under either condition, even when heat was added ? Explain, for each compound, why it might not react by a substitution reaction.
Hydrogen exhibits several series of line spectra in different spectral regions. For example the Lyman series (nf = 1 in Balmer-Rydberg equation) occurs in the ultraviolet region while the Balmer (nf = 2) series occurs in the visible range
Write a balanced equation for the diazonium salt 1-naphthol and aminobenzenesulfonic acid (para structure). Draw a possible structure
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