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The solar constant is the incident energy per unit of time on a unit area of a surface placed at right angles to a sunbeam just outside the earth's atmosphere.
The value of the solar constant is 1.37kW/m2. The area of a sphere with radius 93,000,000 miles is 2.79 X 1023m2, and the surface area of the sun is 6.09 x 1018 m2.
Assuming that the sun is a blackbody, calculate its surface temperature.
75.0 g of ammonium sulfate is placed in a 500.0 ml flask and diluted volume. What is the percent by mass concentration of this solution? (assume the solution density is 1.00 g/ml)
For the equilibrium H2(g)+ CO2(g) H2O(g)+CO(g) Kc=3.18 at 1106K. If each of the four species was initially present at a concentration of 3.000M.
A box of mass 5.0 kg if accelerated from rest across a floor at a rate of 2.0 m/s2 fro 7.0s find the net work done on the boxCopy and paste your question here...
For the diprotic weak acid H2A, Ka1 = 3.5 × 10-6 and Ka2 = 6.7 × 10-9. What is the pH of a 0.0800 M solution of H2A? What are the equilibrium concentrations of H2A and A2- in this solution?
2KOH + H2SO4 --> K2SO4 + @H2O .850 L of .450 m h2so4 is mixed with .800 L of .230 M KOH. what concentration of sulfuric acid remains after neutralization
Find the mass of the substance and the volume of a gas in a reaction - determine the mass of solid ammonium nitrate that must be used to obtain 0.145 L of dinitrogen oxide gas at STP.
Calculate the pH at the second stoichiometric point when 100 mL of a 0.020 M solution of sulphurous acid (Ka1=1.4*10-2, Ka2=6.3*10-8) is titrated with 1.5 M NaOH.
Silver crystallizes in face centered cubic unit cell. a silver atom is at edge of each lattice point the length of the edge of the unit cell is 0.4086 nm. What is the atomic radius of silver
In one of the neutron-induced fission reactions of U-235(atomic mass = 235.043922 ), the products are Ba -140 and Kr-93 (a radioactive gas). What volume of Kr-93(at and 1.0 ) is produced when 1.80 g of U-235 undergoes this fission reaction
What is the ph of a solution that is 0.10 M in ethanoic acid and 0.50 M in sodium ethanoate [Ka(CHcCOOH) = 1.8 x 10-5)]
The respective standard reduction potential in volts for Ni2+ and Ag+ are -0.28 and +0.80. The oxidizing agent in a cell based on nickel and silver is a) Ni b) Ni2+ c) Ag+ d) Ag e) the salt bridge
Consider the following reaction at equilibrium. What effect will increasing the volume of the reaction mixture have on the system
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