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An asteroid in an elliptical orbit about the Sun travels at 1.2 x 106 m/s at perihelion (the point of closest approach) at a distance of 2.0 x 108 km from the Sun. How fast is it traveling at aphelion (the most distant point), which is 8.0 x 108 km from the Sun?
for the reaction ch4202 yields co22h2o how many moles of carbon dioxide are produced from the combustion of 100 grams
The maximum allowable concentration of Pb2+ ions in drinking water is 0.05ppm that is, 0.05 g of Pb2+ in 1million g of water. Is this guideline exceeded if an underground water supply is at equilibrium with the mineral anglesite, PbSO4 (Ksp=1.6 x1..
Express you answer as a chemical equation. Identify all of the phases in your answer.
Problem- If 3.49 moles of an ideal gas have a pressure of 8.56 atm, and a volume of 64.53 L, what is the temperature of the sample
At 1500 degrees C the equilibrium constant for the reaction CO(g)+2H2(g) -->
Question- Calculate the enthalpy change for each reaction in kj/mol. Assume the calorimeter has a heat capacity of 0 and that each solution has the same weight and heat capacity of water.
Calculate the number of moles of B at each time in the table. 0 s mol 40 s mol 80 s mol 120 s mol 160 s mol (b) Calculate the average rate of disappearance of A for each 40 s interval, in units of mol/s. 0 - 40 s mol/s 40 - 80 s mol/s 80 - 120 s m..
The atomic weight of a newly discovered element is 98.225 amu. It has two naturally occuring isotopes. One isotope has a mass of 96.780 amu.
Use le chatelier principle to explain why the buffer prevents large changes from occurring in pH when (a) an acid enters the blood stream (b) and base enters the bloodstream.
What is the minimum frequency of light necessary to emit electrons from sodium via the photoelectric effect What is the wavelength of this light
a scientist watns to make a solution of tribasic sodium phosphate na3po4 for a laboratory experiement. how many grams
A semipermeable membrane is placed between the following solutions. Which solution will decrease in volume? Solution A: 1.31% (m/v) starch Solution B: 7.48% (m/v) starch
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