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Titration of an 360 mg sample of synthesized aspirin with 0.100 M NaOH solution required 20.30mL. what is the EMM of the sample and what is the % ASA?
You have 250mL of a 0.80 M solution of silver nitrate AgNO3 (169.87 g/mol) dissolved in water. How many grams of AgNO3 does the solution have?
Is an electron ever even momentarily found between the first and second energy levels? Explain based on the wave properties of electrons.
The m =1 diffraction of the first member of the Paschen series is located 60.7 cm from the central maximum. What is the position of the second member of the Paschen series?
A lead atom has a mass of 3.4*10-22g. How may lead atoms are in a cube of lead that has a volume of 2.00cm3 if the density of lead is 11.3g/cm3
Determine the total stored energy before they are connected, after they are connected, and what is the change in energy?
25.0 ml of a hydrofluoric acid solution of unknown concentration is titrated with 0.200 M NaOH. After 20.0 mL of the base solution has been added, the ph in the titration flask is 3.00.
The reaction N2(g) + 3 H2(g) ? 2 NH3(g) is at equilibrium in a reaction chamber. If an experimenter injects a small amount of N2 into the chamber, what happens to the forward reaction rate at that m
A 71 tall graduated cylinder is filled with 21 of glycerin (density 1260 ) and 50 of water. Find the pressure difference between the top and bottom cylinder.
Write a nuclear equation to describe the neutron induced fission of U-235 to form Xe-134 and Sr-100. Determine how many neutrons are produced in the reaction?
If a coal burning electrical generating plant burns 2 tons of coal to generate 6000 kWh of electricity, calculate the efficiency of the plant as the ratio of electricity output to fuel energy input.
When 50ml of 0.500M HCl at 25C is added to 50ml of 0.500M NaOH at 25C in a coffee cup calorimeter, the temperature of the mixture rises to 28.2C. What is the heat of reaction per mole of acid?
A projectile is fired with a velocity of 980 m/s at an angle of 30 degrees above the horizontal from the top of a hill that is 40.0 m above the flat land below. The projectile just barely passes ove
A voltaic cell with Ni/Ni2+ and Co/Co2+ half-cells has the following initial concentrations: [Ni2+]=0.80 M; [Co2+]=0.20 M. What is the initial E cell? What is [Ni2+] when Ecell reaches 0.03 V? What
What percentage of the maximum possible efficiency does this plant obtain? (Assume the temperature of the environment is 20 degrees celcius)
When Pcl5 solidifies it forms PCl4+ cations and PCl6- anions. According to valence bond theory, what hybrid orbitals are used by phosphorous in the PCl4+ cations?
Energy could be taken as heat from the atmosphere(assume 30degrees celcius) and rejected as heat as heat to the Hudson River (10degrees celcius). What is the maximum efficiency of such an engine for
At a height of about 150km, the atmospheric pressure is 3*10^-6 torr and the temp is 420K. What is the concentration of the atmosphere in molecules per milliliter at 150km?
A projectile is launch from the ground level at an angle of 12.0 degrees above the horizontal. It returns to ground level. To what value should the launch angle be adjusted, without changing the lau
You are keeping pace with another runner, at 6 minutes per mile, but are 10 m behind her when she is 100m from the finish line. What constant acceleration do you need to catch her at the finish if s
Chromium (iii) hydroxide Cr(OH)3 is highly insoluble in distilled water but dissolves readily in either acidic or basic solution. Briefly explain why the compound can dissolve in acidic or in basic
An object lifted 10 meters gains 200 J of potential energy. If the same object is lifted 20 meters, its potential energy gain is:
What is the volume of CO2 is being produced for every metric ton (1*10^3 kg) of limestone (CaO) that the plant produces from CaCO3. Pressure is .966 atm and Temp is 875C
Radioactive gold-198 is used in the diagnosis of liver problems. The half life of this isotope is 2.7 days. If you begin with 5.6-mg sample of the isotope, how much of this sample remains after 5.0
Two parallel plate capacitors have circular plates. The magnitude of the charge on these plates is the same. However, the electric field between the plates of the first capacitor is 2.36 x 105 N/C,