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A certain first-order reaction (A -->product) has a rate constant of 8.70×10^-3 s^-1 at 45 Celsius . How many minutes does it take for the concentration of the reactant,[A], to drop to 6.25% of the original concentration?
A certain second-order reaction (B--> products) has a rate constant of 1.40×10^-3 M^-1*s^-1 at 27 Celsius and an initial half-life of 280s . What is the concentration of the reactant B after one half-life?
A chemist wants to make 4.5L of a 0.340M CaCl2 solution.What mass of CaCl2 (in g ) should the chemist use?
Calculate the amount of energy in kilojoules needed to change 117 of water ice at 10 to steam at 125 . The following constants may be useful.
Predict the products when cyclohexanol is heated in the presence of H+. Show both the organic product and the byproduct
Calculate the energy and wavelength associated with an a particle that has fallen through a potential difference of 4.0 V.
How much heat is required to warm 1.20 kg of sand from 26.0 0C to 100.0 0C?
If 32.0 g CaC2 are consumed in this reaction, how many moles of H2O are needed?
A 0.325 mol sample of PCl5(g) is injected into an empty 4.15 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.
You conduct an experiment where N2 is collected over water in a 2.12 L flask at 23.oC. At the conclusion of the experiment, the total pressure in the flask is 652. torr. What is the pressure of N2 in the flask?
Each of the following names is an incorrect IUPAC name. Indicate, if possible, the correct name of the compound. can you please explain why these names are not right
How many liters of oxygen gas, at standard temperature and pressure, will react with 25.0 grams of magnesium metal? 2 Mg + O2 yields 2 MgO
A tablet of Vitamin C changed color at 23.7 mLs of Iodine. how do you determine how much vitamin c is in the tablet.
At 1 atm, how much energy (kJ) is required to heat 65.0 g of H2O(s) at -20.0 degrees C to H2O(g) at 135.0 degrees C?
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