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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. Unfortunately, a faulty valve between the furnace and absorbers allowed some of the gas produced to escape before the mass of CO2(g) and H2O(g) were measured. The researchers also know from previous reactivity experiments that CxHy has at least one ?-?bond. It will take at least a week to have a replacement valve sent from the manufacturer, but the grant proposal, which requires the molecular formula, is due on Monday. Can you help determine the molecular formula of the compound? [Hint: from the balanced equation for the complete combustion of CxHy it is possible relate the moles of O2(g) required to the unknown subscripts x and y. Then see if you can find a formula satisfying the relationship.]
When 2.25 g of sodium hydroxide (NaOH) was dissolved in 150.00 g of water a value of 11.00oC was obtained for ?T. Calculate the molarity of the sodium hydroxide solution. _______ Calculate the value (calories) for the heat of solution of 2.25 g of..
a 2.53g of solid NaOH is dissolved in 100g of water in a coffee cup calorimeter, all the reagents initially being at 20 degrees Celsius. Calculate the final temperature of the solution obtained, given the fallowing information
for the equation below identify the substance oxidized the substance reduced the oxidizing and reducing agent and write
The density of a 0.0122 M KMnO4 is 1.037 g/mL. Suppose 26.35 g of 0.0122 M KMnO4 are required to titrate 1.072 g of a household H2O2 solution. Except for answers to (a) and (e), use scientific notation. Do not include units, just enter numerical v..
The water level in a graduated cylinder initially at 225 rises to 278 after a piece of lead is submerged. What is the mass in grams of the lead?
Draw the product of the following reaction between propanoyl chloride and p-methoxynitrobenzene. Include all formal charges.
The measured % transmittance at the maximum wavelength is 75.3%. A 1.000 mL portion of 0.01000 Cu(II) is then added to the same cell and mixed with the original solution
A sample of nitrosyl bromide (NOBr) decomposes according to the equation 2NOBr(g)-->2NO9g) +Br2 An equilibrium mixture in a 5.00- vessel at 100 degrees celsius contains
a 13.6 sample of nh4no3 is dropped into a constant-pressure calorimeter containing 175 g of water at 23.5 c. what
At a particular temp and pressure it takes 4.55 min for a 1.5 L sample of He to effuse through a porous membrane. how long would it take for 1.5 L of F2 to effuse under the same conditions
Solid benzoic acid, C6H5COOH(s), is often used to determine the heat capacity of a bomb calorimeter, because the constant volume heat of combustion of this compound is known with high precision
Iron reacts with hydrochloric acid to produce iron (II) chloride and hydrogen gas. Fe(s) + 2 HCl(aq) -> FeCl2(aq) + H2(g) How many moles of HCl will react with 4.6 moles of Fe?
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