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Neutron stars are believed to be composed of solid nuclear matter, primarily neutrons.If the radius of a neutron is 1.0 × 10-13 cm, calculate the density of a neutron in g/cm3. (volume of a sphere = ) Assuming that a neutron star has the same density as a neutron, calculate the mass in kilograms of a small piece of a neutron star the size of a spherical pebble with a radius of 0.10 mm
From the number if moles of ammonia calculated in part (a - below) determine the number of micrograms of mitrogen per gram of dry soil. Assum you have 2.753 f of soil and all of the ammonia diffused from the soil.
Population ratio between two energy levels is 0.98. The space between the energy level is 0.625 meV. What is the system's temperature?
suggest a procedure you could follow to determine whether it was necessary to use this solution as a reference or whether distilled water would have been just as satifactory
A mass of 2.50 g of hydrated copper(II) sulfate is placed in a crucible and heated. On heating, 1.59 g of white anhydrous copper(II) sulfate is left behind. Determine the ratio of water to copper(II) sulfate.
Outline two different methods that could be used to prepare 2-methyl-2-butanol using a Grignard synthesis. Which method is the best? Explain
A 100.0-L flask contains a mixture of NO2 gas and CO gas. If the concentration of NO2 is 5.5 × 105 ppm, and the total pressure is 790 torr, what is the partial pressure of CO in the flask?
Sketch a cube. How many vertices does it have? How many edges? How many faces? Mark four vertices of the cube that are also vertices of a regular tetrahedron.
A free electron initially at rest at the back of Cathode ray tube in your television accelerate through a potential
An alien rocketship is traveling at a speed of 40 inches per minute. At this speed, how many feet will it travel in 1 second? Round to the nearest thousandth.
The higher heating value (HHV) of a fuel is its standard heat of combustion at 25 C with liquid water as a product; the lower heating value (LHV) is for water vapor as product.
Rubidium-87 decays by beta decay with a half-life of 4.9 x 10^10 yr. How many 87Rb atoms are in a moon rock sample that has a rubidium decay rate of 3500 disintegrations per hour
Determine the empirical formula of a compound containing 77.3% silver, 7.4% phosphorus and 15.3% oxygen.
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