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The standard molar heat of vaporization of her water is 40.79 kJ per mole. What mass of mass of steam is required to release 500 kilojoules of heat energy upon condensation?
A compound composed of only C and F contains 17.39% C by mass. What is the empirical formula?
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
Hospital X-ray generators emit X-rays with wavelength of about 15.0 nanometers (nm), where 1 nm= 10^-9 m. What is the energy of the X-rays
show the calculation for the percent yield of K3[Fe(C2O4)3].3H2O using your actual yield and the theoretical yield
explain why it is dangerous to mix solutions in a test tube by placing a finger
Multiple choice questions in Nuclear chemistry - As the temperature of a sample of a radioactive element decreases, the half-life will
At the end of the process, the pressure is 2.50x10 to the 6 Pa. Calculate the final temperature of the gas. Calculate q, w, deltaU, and deltaH for this process.
The volume of 350. mL of gas at 25°C is decreased to 135 mL at constant pressure. What is the final temperature of the gas?
What is a zymogen. How are they activated. Give an example. What is a transition state. And what is its relationship with the active site
How many theoretical stereoisomers are there for morphine, boron-phenylalanine, and lysergic acid diethylamide (LSD). What is the degree of unsaturation for each molecule
Explain what is the empirical formula of the substance that has the following percentage composition 31.6% carbon, 5.30% of hydrogen and 63.1% oxygen
how does the strength of the attraction between water molecules and sodium and chloride ions compare with the strength
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