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Mass of empty test tube 7.597 gMass of test tube and sample before heating 8.089 gMass of test tube and sample after heating 7.956 g Mass of unknown sample that was heated Mass of oxygen produced Moles of oxygen produced Moles of KClO3 decomposed (moles of KClO3 in sample) Mass of KClO3 decomposed (mass of KClO3 in sample) Percentage of KClO3 in sample
Find out the number of grams of Na2SO4 that can be prepared by the reaction of 7.44 g of NaOH with sufficient H2SO4
Assuming that a neutron star has the same density as a neutron (4.0 x 10^14 g/cm3), calculate the mass (in kg) of a small piece of a neutron star the size of a spherical pebble with a radius of 0.20 mm.
sugar 82.00 grams molar mass 342.3 gmol was dissolved in water. the freezing point of the solution was determined to be
Consider a mixture is a 2 dm^3 flask at 27 degree C. For each of the following mixtures, calculate the partial pressure of each gas, the total pressure, and the compositon of the mixture in mole percent.
What law states that mass and energy can be changed from one form to another but their sum remains constant?
the land area of greenland is 840000 mi2 with 132000 mi2 free of ice. the average thickness of ice is 5000 ft. the
calculate the molar solubility of calcium carbonate in 0.050 molar calcium chloride and ksp for calcium chloride is 3.8X10^-9.
what affect would each of the following changes in procedure have had on the calculated percentage of fat found for
The final supernatant when heated produced a purple flame. Identify which of these ions were present in the solution, which were absent, and for which ones no conclusions can be drawn.
The linear form (y=mx+b) of the Arrhenius equation is given below : ln K = -Ea/RT + Ln A 1) In order to find the activation energy (Ea) you will need to make a linear graph
The Kf for Cu(en)2^2+ is 1 x 10^20. What is the concentration of Cu^2+ (aq) in the solution?
Why is sodium chloride added to the tea solution before extracting with ethyl acetate? 4 grams of calcium carbonate was added to 90 ml's of water in a flask
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