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Problem- A sample of liquid copper required 254 kJ to vaporize the sample. Calculate the mass of copper vaporized. The heat of vaporization of copper is 4.81 kJ/g.
Mention all the steps and procedure to determine the correct value
Predict the physical state of krypton at -150°C (Mp = -157°C, Bp = -152°C) and normal atmospheric pressure.
Explain why if benzoic acid were substituted for 2-methoxyphenylacetic acid in this experiment the enantiomeric ratio of the yeast reduction product could not be determined by 1 H NMR.
Question- A sample of nitrogen gas is placed into a container at 200k. If the temperature of the container is reduced by 100 deg C and the measured pressure decreases by 50%, how does the volume of the container change
Why are masses in the chemistry laboratory usually determined by a difference method(using a beaker to contain the object to be weighed rather than just placing the object directly on the pan of the balance
Calculate the pressure exerted by Ar for a molar volume of 1.04L/mol at 475K (a) the ideal gas law and (b)using the van der Waals equation of state
Problem- What major product can be expected when reacting ch3ch2cooch2ch3 with 1) naoch2ch3 then 2) H3o+
What is the molarity of a 600mL solution prepared by dissolving 6.72 g of sulfuric acid, H2SO4
Phenolphthalein has a pKa of 9.7. It is colorless in its acid form and pink in its basic form. For each of the pH's listed, calculate the ratio and predict the color
Phosphate can buffer in three pH ranges. Give the chemical formulas of the buffer pairs and give the range in which each buffers. Start with H3PO4/ H2PO4-1
A gaseous mixture containing 0.150 mol fraction of carbon tetrachloride (CCl4) and 0.850 mol fraction of dry air is initially at 65.0°C and 1121 mmHg
THE IONIZATION ENERGY OF HYDROGEN. In a normal hydrogen atom, the electron is in the lowest energy state. The maximum energy that a hydrogen atom can have is 0 cm-1
If 8.8 mg of iodine-123 is used in an experiment, how many milligrams of iodine-123 should remain after 50 hours. Assume that iodine-123 has a half-life of 10 hours.
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