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Can someone help me to do this problem: Perchloroethylene, also known as perc, is the solvent used in most dry cleaning. It consists of C and Cl. Determine the empirical formula of perchloroethylene given that a 2.58-g sample yields 1.37g Co2 in a combustion analysis experiment. Add subscripts to complete the empirical formula.
A 0.5118g sample of CaCO3 is dissolved in a 12 M HCl and the resulting solution is diluted to 250.0mL in a volumetric flask. How many moles of CaCO3 are used (formula mass=100.1)
acetylene has a pka of25. calculate the ka. the pka of phenol is 9.9. which isthestronger acid acetylene or phenol?
As a result of a chemical spill, benzene is evaporating at the rate of 1 gram per minute into a room that is 6 m * 6 m * 3 m in size and ahs a ventilation rate of 10m^3/min. Compute the steady-state concentration of benzene in the room.
Complete and balance the following equation Write the ionic equation and net ionic equation. Indicate spectator ions and determine if a precipatie would form. (NH4)2C03(aq)+CaCl2
The Ka for the dissociation of Aspirin in aqueous is 3.3 x10-4 at 25?C. If the initial concentration of Aspririn is 0.005M and using equilibrium reaction below calculate the concentration of Hydronium ion and the concentration of the conjugate bas..
The second-order reaction, 2 Mn(CO)5 Mn2(CO)10 has a rate constant equal to 3.0 x 109 M-1s-1 at 25°C. If the initial concentration of Mn(CO)5 is 1.0 x 10-5 M.
If 8686 C of charge is passed through molten magnesium chloride, calculate the number of moles of Mg(l) produced
The vapor pressure of water at 20degrees Celcius is 17.5 mmHg. What is the vapor pressure of water over a solution prepared from 2.00x10^2g of sucrose(C12H22O11) and 3.50x10^2g water
imagine that you dissolve 10.0g of a mixture of nano3 and kf in 100.0g of water and find that the temperature rises by
A jar test has shown that the optimum dose of ferric chloride consumes all of the alkalinity. If the amount of ferric chloride that is in excess is 10 mg/L, how much lime (Ca(OH)2) in mg/L must be added to neutralize the acid formed
How many moles of oxygen are formed when 58.6 g of KNO3 decomposes according to the following reaction. The molar mass of KNO3 is 101.11 g/mol. 4 KNO3(s) 2 K2O(s) + 2 N2(g) + 5 O2(g)
ammonia, NH3, reacts with hypochlorite ion, OCl-, to produce hydrazine, N2H4. How many moles of hydrazine are produced from 5.85 mol of ammonia if the reaction has a 78.2% yield
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