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What is the velocity (m/s) of a doubly protonated ion with a m/z ration of 324.9, which has been accelerated to a kinetic energy of 0.75 MeV? what is the radius of curvature for this ion, when it experiences a homogeneous magnetic field of 7T?
what are the flight times of the signally-and doubly protonated ion forms of a 1735.4 Da peptide accelerated by a potential of 25.00 kV in a 1.250 m flight tube?
The activation energy for the isomerization of methyl isonitrile (see figure below) is 160 kJ/mol. Calculate the fraction of methyl isonitrile molecules that has an energy of 160.0 kJ or greater at 499 K.
calculate the amount of potassium ferricyanide(formula weight 329.23g/mole) that must be used to prepare 250 mL of a 2.5X10-3 M solution.
A weak acid HX has Ka = 1.00×10-6. What would be the pH of a 0.10 M solution of HX in water?
Write the reaction which occurs when BH3 encounters water. Hint: a gas is evolved and boric acid is formed. How does acetone react with BH3?
Describe how soap works, include a drawing of a micelle in your description. Describe the difference between saturated and unsaturated fats. How can you as a consumer tell one from the other?
Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide. Discuss at least three potentially hazardous features associated with concentrated sulfuric acid.
calculate the mass of silver chloride and dihydrogen monosulfide formed when 85.6 grams of silver sulfide reacts with excess hydrochloric acid.
What is the molar mass of the unknown gas? Express your answer to four significant figures and include the appropriate units.
A 350.0 gram sample of copper is initially at 25.0 °C. It absorbs 12.50 kJ of heat from its surroundings. What is its final temperature, to the nearest tenth of a degree?
An aqueous antifreeze solution is 40.0% ethylene glycol, C_2H_6O_2, by mass. The density of the solution is 1.05 g/ml. Calculate the molality of the ethylene glycol.
O2(g) + 4 HCl(g) → 2 H2O(l) + 2 Cl2(g) When 64.5 g of HCl are allowed to react with 17.6 g of O2, what is the theoretical yield of Cl2(g) in this reaction.
Size of a hydrogen spherical balloon for lifting a payload, Determine the size of a spherical balloon filled with hydrogen at 30°C and atmospheric pressure for lifting 400Kg payload
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