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In this lab we heated a magnesium ribbon in a crucible to produce the MgO. The point was to discover it's Empirical Formula. Knowing that room air contains N2 as well as O2 we added H2O to get rid o
An electron moving via an electric field of around 500 N/C and a magnetic field of around .10 T undergoes no force. The two fields and the electrons direction of motion are jointly perpendicular. De
Perform a basic economic analysis. Assuming that it will cost the $25/L to dispose of liquid waste and $25/kg to dispose of solid waste, demonstrate how the cost of waste disposal influences the cos
Determine the silver concentration in a solution prepared by mixing the 250 mL of 0.310 M silver nitrate with 100 mL of 0.160 M of sodium chromate?
Determine a reactor in which the production rate of U-239 via the238U(n, γ) 239U reaction is 10^5 atoms/s. Determine the activity of 239Pu after an irradiation of
A ball of 43g is fired horizontally with the initial speed, Vo, toward a ball of 110 g which is hanging motionless from a string of 1.0 m long. The balls experience a head-on, perfectly elastic coll
Determine the probability of a 222Rn atom decaying in our lounges? The atmospheric concentration of 222 Rb may be assumed to be 1 pCi/L. In an average breath we inhale 0.5 L of air and exhale it 3.
Consider the case where A → B → C and where λA = λB. Develop an expression for the activity of B as a function of time. Determine the time t when the activity of Breaches a m
Sulphur dioxide reacts with the chlorine to form the thionyl chloride (used as a drying agent for inorganic halides) and dichlorine oxide(used as a bleach for pulp, wood and textiles).
Let, consider the Bohr model for the hydrogen atom. An electron is excited to from the ground state to the n = 5 orbit through a photon of light.
Magnesium nitrate (Mg (NO3)2) solution is mixed with the potassium carbonate solution (K2CO3). Write down the balanced molecular equation describing this reaction using the appropriate. State subscrip
Discuss why the Cell Membranes are disrupted from a slight cooling? For example, I did a lab and the plasma membranes were disrupted more at 5 degrees Celsius than they were at room temp.
Let, consider a phototube having a cathode made of Sodium metal: i) Determine the longest wavelength which will generate photoelectrons when no voltage is applied to the phototube?
How many iron atoms are within a unit cell? Metallic iron crystallizes in a cubic lattice the unit cell edge length is 287 pm. The density of iron is 7.87 g/cm3.
Determine how many times faster would this reaction be if the reaction temperature is 50.0 0C? A certain reaction with activation energy of 64.5 kJ/mol, runs at the 25.0 0C and its rate is c
A car of 1200 kg is moving at 5 m/s east. It hits an 1800 kg car at rest. The cars encompass an elastic collision and move in the east or west direction. The velocity of the car of 1800 kg after the
Suppose that 4.06 x 106 kJ are required to heat a swimming pool. If this energy is derived from the combustion of methane (CH4) at standard conditions (25 oC and 1 atm) explain what volume i
How much should be invested now to provide X in thirty years, 3x in forty years, and 9x in fifty years? Suppose that fund continues to perform as it has in past.
i) Let, consider a neutron star whose mass is two times the mass of the Sun and whose radius is 10.1 km. When it rotates with a period of 2.51 s, determine the speed of a point on the Equator of th
All protein structure is based upon the formation of the amide plane. The 2 degrees of freedom related to rotations about the chiral carbon atom are described by the parameters Φ and ψ .
A 6.0g sample of a compound whose empirical formula is (CH2) x is dissolved in the 200g of benzene. Molecular weights can be determined by freezing point depression measurements.
Let consider a dielectric mirror to be employed in a He-Ne laser of 623 nm. This mirror is composed of alternating layers of MgF2 (n = 1.38) and TiO2 (n = 2.41). This material is to be coated on th
Discuss why does sealing the open end of a melting point capillary tube allow you to measure the melting point of a compound that sublimes?
Standing on the surface of a small spherical moon having radius 5.13 x 104 m and whose mass is around 6.11 x 1018 kg, an astronaut throws a rock of mass 1.67 kg straight upward with the initial speed