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The combustion of a hydrocarbon produces three water molecules for every two carbon dioxide molecules. What is the empirical formula of the hydrocarbon?
The rate constant for the first-order decomposition of N2O is 3.40 s to the -1. What is the half-life of the decomposition
Describe the mixture before it is centrifuged. Be specific using scientific words that aplly such as homogeneous or heterogeneous
Propose and state the mechanism for the reaction that occurs between 2-methyl-2 propanol as well as NH4Cl in an H2SO4/H2O medium.
Why was anhydrous not wet diehtyl ether used in the preparation and reaction of the grignard reagent
A balloon has a volume of 10,500 liters, and the temperature is 15°C. If the temperature were -25°C, what would the volume of the balloon be?
A gas mixtue of Ne and Ar has a toal pressure of 4.00 atm and contains 16.0 mol of gas. If the partial pressure of Ne is 2.75 atm, how many moles of Ar are in the mixture
What volume of this gas must be burned to raise the temperature of 5.5 L of water by 5 degrees C? Assume the gas is at 1.0 atm and 298 K and that all three gases are completely oxidized in the combustion.
Many organic chemists when making a new solid compound often first try ethanol as a recrystallizing solvent. If soluable at room temperature, they simply add water and this often works! Why?
A 0.451 M solution of a weak acid, HA, has a pH of 4.01. Calculate Ka for the acid. Use E notation and 3 significant figures.
A 20ml volume of previously boiled, deionized water is added to the Erlenmeyer flask to prepare the sample for titration. Define why this volume is not critical to the analysis.
While 25mL of 0.10 mol/L HBr(aq) is titrated with 0.10 mol/L NaOH(aq), explain what is the pH at the equivalence point. Choose an appropriate indicator.
Calculate the concentration of ALL species in a 0.25 M solution of ethylammonium chloride (EtNH4Cl). The Kb value for the weak base ethylamine (EtNH2) is 5.6 x 10^-4.
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