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Suppose that a 1.0 L reaction vessel initially contains 1.0 mol of O3 and 1.0 mol of O2. What fraction of the O3 will have reacted when the rate falls to one-half of its initial value?
95% wt solution of ethanol in water has density of 0.804gm/mL. Find mass of 1.00L of this solution and the number of grams of ethanol per litre ?
A mixture of CaCO3 and CaO weighing 0.635 g was heated to produce gaseous CO2. After heating, the remaining solid weighed 0.427 g. Assuming all the CaCO3 broke down to CaO and CO2,
Its atomic number was believed to be 126. What is the most probable distance of the innermost electrons from the nucleus of an atom of this element?
Further studies will refine how much water is needed for endangered species protection. States hope it will be the 130-150 KAF initially agreed upon rather than the 415 KAF the FWS thinks it is. What happen if cooperative agreement fails?
How many moles of ammonia are produced when 20 moles of hydrogen react with 40 moles of nitrogen
If a raindrop weighs 57 mg on average and 5.1 X 10^5 raindrops fall on a lawn every minute, what mass of rain falls (in kg) on the lawn in 1.5 hours?
Which of the following terms define(s) an acid according to the Bronsted-Lowry theory?
The complete combustion of acetylene, C2H2(g), produces 1300. kJ of energy per mole of acetylene consumed. How many grams of acetylene must be burned
57.0 mL of a 1.80 M solution is diluted to a volume of 238 mL. A 119-mL portion of that solution is diluted using 117 mL of water. What is the final concentration.
A system conducts 238 cal of heat to the surroundings while delivering 331 cal of work. what is the change in internal energy of the system (in cal).
Write a balanced equation for the combustion of heptane, C7H16, in oxygen, , forming the products carbon dioxide, and water, H2O. How many grams of water will be produced by the complete reaction of 7.88 grams of heptane?
A local radio station can be tuned in by dialing your radio to a frequency of 101.5 MHz. Calculate the wavelength. (Hint: MHz means 1 x 106 Hz.)
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