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In a rush, a student only measured the mass of the empty beaker once before beginning the experiment and one more time after the entire experiment was finished. the mass of the empty beaker was found to be 0.123g less at the end of the experiment. what happened?
a solution of ethanol c2h5oh in water is prepared by dissolving 65.8 ml of ethanol density 0.79 gcm3 in enough water
Calculate the enthalpy change associated with the conversion of 25.0 grams of ice at -4.00°C to water vapor at 110.0°C. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K
Calculate the electrostatic energy of the system and compare this energy to the Hydrogen atom in its ground state.
Write the structural formula for the product that forms when 1-methylcyclopentene reacts with Br2 in H2O
What is the molarity of acetic acid, CH3COOH (MM= 60.0) in vinegar if a 5.00mL sample of vinegar requires 22.50mL of a 0.195M NaOH solution to neutralize it?
calculate the number of microstates, W, that have this energy. Make sketches of these microstates. Calculate the corresponding entropy for each state.
Draw the correct stereochemical structures of these two compounds of the fumarase-catalyzed reaction. Be sure to include all hydrogen atoms and show the carboxylates as anions.
What is the maximum concentration (in M) of chloride ions in the solution that contains 0100 M Pb2 +? The Ksp for lead (II) chloride is 1.0 x 10-4.
NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.041 M in NH4Cl
Calculate the amount of heat liberated (in kJ) from 351 g of mercury when it cools from 88.0°C to 15.0°C.
Calculate Ecell for the oxidation of Cl(aq) to Cl2(g) by PbO2(s) in an acidic solution. Assume all other reactants and products, except for H+, are in their standard states for the below values. Round your answer to 3 decimal places. Enter scienti..
carbon and oxygen occupies a volume of 452 ml at 63 C and 745 mmHg. identify the gas in the sample (R= 0.0821 L*atm/K*mol)
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