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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.
The pH of the solution is 2.81 after 15.00ml of base is added. Calculate the ionization constant,Ka, of lactic acid.
A common piece of laboratory glassware is a 125 mL beaker. What is this volume in the English system of units? [1 quart = 946. liter = 32 fl oz]
Given that ?G°f for NH3 = -16.67 kJ/mol, calculate the equilibrium constant for the following reaction at 298 K: N2(g) + 3 H2(g) qe 2 NH3(g)
Hydrochloric acid reacts with zinc metal to form zinc chloride and hydrogen gas. If 345.2 g of zinc metal reacts with 231.6 grams of acid. How many liters of hydrogen gas are produced? How many moles of zinc chloride are produced?
a disgruntled postal worker dumps a liquid culture of anthrax into a river nine hundred meters upstream of the intake
A 4.000 g sample of an unknown metal, M, was completely burned in excess O2 to yield 0.02225 mol of the metal oxide, M2O3. What is the metal?
Assuming STP, how many liters of carbon dioxide are produce when 5.74 g of CaCO3 reacts with an excess of H3PO4
The reaction: 2 HI → H2 + I2, is second order and the rate constant at 800 K is 9.70 × 10-2 M-1 s-1. How long will it take for 8.00 × 10-2 mol/L of HI to decrease to one-fourth of its initial concentration.
Indicate which of the following is correct with regard to size and shape of an orbital and its corresponding quantum numbers, n and l
bac is often reported in weight-volume percent wv. for example a bac of 0.08 corresponds to 0.08 g ch3ch2oh per 100 ml
A quantity of 200.0 mL of 0.862 M HCl is mixed with 200.0 mL of 0.431 M Ba(OH)2 in a coffee-cup calorimeter (Hint: write and balance the chemical equation for this neutralization process). The initial temperature of HCl and Ba(OH)2 is the same at ..
Calculate the concentration of Cu in the chloroform phase if 39 mL of a 0.28 M aqueous Cu solution buffered to pH 4 is equilibrated with 12 mL of chloroform.
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