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When heated, KClO3 solid forms solid KCl and O2 gas. A sample of KClO3 is heated and 226 mL of gas with a pressure of 744 mmHg is collected over water, at 26°C. At 26°C, the vapor pressure of water is 25 mmHg. A. What is the pressure of the dry O2 gas. B. How many moles of O2 were produced? C. How many grams of KClO3 were reacted
calcuate the number of moles of HCI and of NaOH present when mixing 50.0mL
Consider the reaction CaCN2 + 3 H2 O → CaCO3 + 2 NH3 . How much CaCO3 is produced if 47.5 moles NH3 are produced?
A 93 gram solution of silver nitrate contains 16 grams of AgNO3. What is the percent by mass of silver nitrate in this solution?
Complete and balance the molecular equation, including phases, for the reaction of aqueous copper(II) chloride, CuCl2, and aqueous potassium phosphate, K3PO4.
Combustion reaction, A fuel has the following weight percentage composition, C = 52%, H = 11%, S = 0%, O = 9%, moisture = 13%, Ash = 15%
To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule
Calculate the work (in kJ) when 1.70 moles of hydrogen gas are produced from the reaction of sodium in excess water at 298 K
How much energy is required to decompose 765 g of PCl3, according to the reaction below? The molar mass of PCl3 is 137.32 g/mol and may be useful.
A half-cell containing which of the following metals would produce the greatest emf when it is coupled with a half-cell containing aluminum metal
Three compounds are running on a silica gel TLC plate developed in hexane-ethyl acetate, an alcohol, an aromatic, and a carboxylic acid. Which of the following are true.
An unknown gas has been determined to have the empirical formula CH2. At 27°C and 0.966 atm, the gas has a density of 1.65 g/L. What is the molecular formula of this gas
show that the energy eigenvaules for the free particle E=h2k2/2m are consistent with the classical result E=1/2mv2
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