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Determine the number of protons and neutrons in a carbon-14 isotope and write its symbol in the form A/Z X
Calculate the speed of sound for a wave whose wavelength is 2.5 m and whose frequency is 270 Hz
An alpha particle (q = 2e and m = 6.64e-27 kg) is accelerated from rest through a potential difference of 1.2e+5 volts. Find the speed of the particle after being accelerated
On a mission to a newly discovered planet, an astronaut finds chlorine abundances of 13.85% for 35Cl and 86.15% for 37Cl . What is the atomic mass of chlorine for this location. The mass of 35Cl is
When 36.5 mL of 0.585 M H2SO4 is added to 36.5 mL of 1.17 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate pH of this reaction.
A circular loop in the plane of a paper lies in a 0.85 T magnetic field pointing into the paper. The loop's diameter changes from 20.5 cm t0 5.6 cm in 0.55 s, What is the magnitude of the average in
A straight ladder is leaning against the wall of a house. The ladder has rails 3.20 m long, joined by rungs 0.530 m long. What should be the thickness of the rock
If pure PbI2 is allowed to dissolve in water and produces 5.0 x 10^-3 M I- what value of ksp can be derived
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 14rpm in 9.8s, What force is required at the edge
A wheel 2.25 m in diameter lies in a vertical plane and rotates about its central axis with a constant angular acceleration of 3.50 rad/s2, find the angular position of the point P
Suppose that the atomic mass unit (amu) had been defined as one-sixth of the average mass of an atom of sodium instead of one-twelfth of the mass of an atom of carbon-12. What would the average atom
Light of wavelength 619 nm is incident normally on a diffraction grating. Two adjacent maxima occur at angles given by sin ? = 0.20 and sin ? = 0.32. The fourth-order maxima are missing, What is the
Suppose that the atomic mass unit (amu) had been defined as one-twelfth of the average mass of an atom of nitrogen instead of one-twelfth of the mass of an atom of carbon-12. What would the average
A 1 cm3 air bubble at a depth of 209 meters and at a temperature of 4 oC rises to the surface of the lake where the temperature is 18 oC, what is its new volume
A rigid tank contains 1.50 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 27.4 atm to 4.30 atm
What is the binding energy of an electron in a photosensitive metal (in kJ/mol) if the longest wavelength of light that can eject electrons from the metal is 238 nm? [Data: c = 3.00 x 108 m/s; h = 6
With a particular grating a doublet of the two wavelengths 731.3 and 732.1 nm is viewed in the third order at 9.3° to the normal and is barely resolved. Find the total width of the rulings in na
Write the chemical reaction equation and equalibrium solubility product constant expression associated with the solubility of Ag2CrO4
The radius of the aorta is about 1.0cm , and the blood passing through it has a speed of about 46cm/s, Calculate the pressure drop per cm along the aorta.
The Henry's law constant for N2 in water at 37 °C is 8.2 × 10-7 M/mm Hg. What is the equilibrium concentration of N2 in water when the partial pressure of N2 is 605 mm Hg?
Suppose 47.5 cm of wire is experiencing a magnetic force of 0.7 N. What is the angle in degrees between the wire and the 1.25 T field if it is carrying a 6.5 A current
The Kb of ammonia is 1.8 x 10-5. What is the percent ionization of a solution of ammonia, 0.50 mol L-1 NH3, that contains 0.020 mol L-1 of ammonium nitrate, NH4NO3
In a certain experiment, 2.00 g of NH3 reacts with 2.50 g of O2. a) How many grams of NO and of H2O form? b) how many grams of excess reactants remain after the limiting reactant is completely consu
When 5.156 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 15.09 grams of CO2 and 9.269 grams of H2O were produced.
An object 3.25 cm high is placed 18.0 cm in front of a convex mirror with radius of curvature of 8.30 cm. Where is the image formed