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A 0.1329g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 1769 J/°C. The calorimeter contains exactly 251 g of water as well as the temperature increases by 1.126°C. Compute the heat given off by the burning Mg, in kJ/g and in kJ/mol.
What must be the reaction temperature if a rate of 1.000 x 10^-9 M/s is required and [C] must be kept at 0.03000M. What must be the value of k to achieve the necessary rate?
A 74.0-mL sample of 0.13 M HNO2 (Ka = 4.0 × 10-4) is titrated with 0.14 M NaOH. What is the pH after 25.8 mL of NaOH has been added?
Ice at 0.0° C is mixed with 9.00 102 mL of water at 23.0° C. How much ice must melt to lower the water temperature to 0.0° C
2-bromo-2-methylbutane + H2O. What does that look like when it is drawn? It is an SN1 reaction
A buffer solution contains 0.10 mol of acetic acid and 0.13 mol of sodium acetate in 1.00 L. (a) What is the pH of this buffer? (b) what is the pH of the buffer after the addition of 0.02 mol of KOH? (c) What is the pH of the buffer after the addi..
The oxidation of ethanol CH3-H2C-OH produces acetaldehyde CH3-HC=O. This reaction catalyzed by enzymes takes place in the body after alcohol consumption.
a student heated a .546 gram pure chemical in an atmosphere of oxygen gas until it had completely reacted the final chrominum compound weighed .798 grams what is the empirical formula of this compound?
Hexachlorophene is used as a disinfectant in germicidal soaps. What mass of hexachlorophene (molar mass = 406.9 g/mol) must be added to 125 g of chloroform to give a solution with a boiling point of 62.60°C?
hydrochloric acid is sold as a concentrated aqueous solution. if the molarity of commercial hcl is 12.0 and its density
Calculate the voltage (E°cell) produced by the voltaic cell using the rxn between Zn and Cu2+ if [Zn2+]= 0.001M and [Cu2+]= 1.3M
Seawater contains 0.13% magnesium by mass, and has a density of 1.025g/ml. What fraction of the magnesium can be removed by adding a stoichiometric quantity of CaO (that is, one mole of CaO for each mole of Mg2+)
Calculate the Molarity of a 0.074 M solution of ethyl alcohol in water at 25 degrees C. (Assume the density of the solution at such a low concentration is equal to that of water at 25 degrees C, 0.997 g/mL.)
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