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If the volumes in the buret and the flask are identical and the concentration of the acid in the buret is 0.250 M, what is the concentration of the base in the flask?
The balloon is released and reaches an altitude of 6.5 km, where the pressure is 0.5 atm. If the temperature has remained the same, what volume does the gas occupy at this height?
A container of water is heated from 23.5C to 85.0C. This process requires 21,900 Joules of heat. Calculate the mass of the water. (c=4.184 J/g-C)
Calculate the minimum difference in standard electrode potentials needed to lower the concentration of the metal M 1 to 2.0x10-4M in a solution that is 1.0x10-1 M in the lessreducible metal M2 wher
Calculate the number of kg of coal needed to produce the same amount of energy as the fission of 1 kg of U-235 (235.05g/mol).
a mixture of 70 mole% butane and 30 mole % hyrdrogen is burned with excess air. Fractional conversion of 85% of the butane and 90% of the hydrogen are achieved; of the butane that reacts, 95% goes t
Compute E0 for the process Ni(CN)4 2- + 2e = Ni(s) + 4CNGiven that the formation constant for the complex is 1.0x1022
A 325-mL sample of solution contains 25.3 g of CaCl2, which is fully dissolved. (a) Calculate the molar concentration of Cl- in this solution. (b) How many grams of Cl- are in 0.100 L of this soluti
Note that in this question, rates of change can be positive or negative. Determine the following rates at a time when the rate of change of O2 is -3.16e-03 M/s.
In a concentration calculation, if we are given the moles of solute and the grams of solvent, what do we need to do first in order to find the molality?
Four ice cubes at exactly 0 having a total mass of 53.0 are combined with 115 of water at 74 in an insulated container. If no heat is lost to the surroundings, what will be the final temperature of
A volume of 12.66 mL of 0.1090 M NaOH solution was used to titrate a 0.771 g sample of unknown containing HC3H5O3. What is the percent by mass of HC3H5O3 in the unknown?
An aqueous solution of etanol, C2H5OH is 19% ethanol by mass and has density of 0.9700gml. Calculate the molality, molarity of the ethanol solution.
Suppose 317 mL of 4.14 M HCIO4 Solution is added to enough water to make a total of 7.70 L. What is the molarity of HCIO4 in this new solution?
The rate constant for a certain chemical reaction is 0.00250 M1 s1 at 25.0C and 0.0125 M1s1 at 50.0C. What is the activation energy for the reaction, expressed in kJ mol?
Describe how the processes of transportation, deposition, and lithification influence the character of sediments. Use three detrital (clastic) and two chemical (non-clastic) rocks to illustrate.
what is the maximum work that could be be obtained if the tank, the device and the surroundings are maintained at 298? Assume the volume of the device is much smaller than the tank volume.
If a raindrop weighs 50. mg on average and 5.1x10^5 raindrops fall on a lawn every minute, what mass (in kg) of rain falls on the lawn in 2.6 h?
This reaction has a 65.0% yield. How much N2 is consumed if 13.6 g of FeN are produced?
What is the pH of this solution? How many mL of 12 M HCl must be added to 0.500 L of the original buffer to change its pH to 9.00?
It was found that 0.475 g of V was deposited on the cathode. What was the original oxidation state of vanadium?
Assume that patient blood lead levels are 0.560 , that total blood volume is 5.1 , and that 1 of succimer binds 1 of lead. What minimum mass of succimer in milligrams is needed to bind all of the le
what is the enthalpy change needed to change 3kg of liquid water at 0C to steam at 0.1MPa and 150C
What mass of HgO was originally present? The vapor pressure of water is 23.8 mm Hg at 25.0°C. Use molar masses with at least as many significant figures as the data given.
What is the product of a modified perkin reaction using 3-benzoylpropionic acid + benzaldehyde + sodium acetate + acetic anhydride when heated in 100 degrees celsius?