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charcoal is primarily carbon. determine the mass of CO2 produced by burning enough carbon to produce 5.00 X 10^2 KJ of heat.
Calculate the empirical and molecular formulas of a compound, C?H?Cr?, given the following: 1) The compund contains 73.94% C and 8.22% H. The rest is Cr. 2) At 25 degrees celius, the osmotic pressure of a solution containing 5.00 mg of the unknown..
A balloon is filled to a volume of 7.00 x 102 mL at a temperature of 20.0 oC. The balloon is then cooled at constant pressure to a temperature of 1.00 x 102 K.
What are the advantages and disadvantages of animal studies and epidemiological studies for establishing dose-response relationships?
What amount of energy would be released upon formation of a mole of 28Si nuclei from their subatomic particles?
When atoomic orbitals are hybirdized the s orbital and at least one p orbital are always hybirdized. III. to create tetrahedral structures the s orbital and all three p orbitals must be hybirdized.
Researchers analyzing an unknown hydrocarbon with chemical formula CxHy found that 225 grams of O2(g) were required for complete combustion of 1.0 mol CxHy, to form CO2(g) and H2O(g) only.
Small helium-neon lasers emit 3.50 mJ/s of light at 634 nm. How many photons does such a laser emit in one minute?
silica gel columns having smaller particle size procedure more effective chromatographic separations
Write a balanced the rmochemical equation for the reaction with an energy term in kJ as part of the equation.
The fuel used in many disposable lighters is liquid butane C4H10 How many carbon atoms
Calculate the work done in joules, when 4.5 L of argon expands to 11 L at constant temperature against an external pressure 545 torr.
In the laboratory, a student named Georgia weighed 5.05 grams of an unknown solid mixture containing benzoic acid, copper (II) sulfate and sand.
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