Describe the basic steps involved in gravimetric analysis
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How much heat in kj would be required to vaporize 1.00 L of diethyl ether (C4H10O), density is 0.714g/mL at 298 K, if the enthalpy of vaporization at this temperature is 26.0 kj/mol?
A student reported the follow ing percentages for his unknown mixture: 25%NH4Cl, 30% NaCl, and 50% SiO2. Assuming that the calculations were done correctly, explain the students error?
What is the orientation of the hydroxyl group when the compound is in chloroform solution? What evidence supports this?
Calculate the ΔH for the reaction above using the data provided. (Hint: you need to calculate q rxn then convert it into kJ/mole)
Aluminum dissolves in an aqueous solution of NaOH according to the following reaction: Which is the limiting reagent?
At 80 °C the vapor pressures of pure liquids X, Y, and Z are 385, 190, and 66 mm Hg, respectively. What pressure must be exerted on the surface of a solution containing one mole of X, three moles of Y, and two moles of Z for boiling point to b
Write the expression for the equilibrium constant, Kc, for the following chemical reaction.
How efficient is the extraction of tea leaves containing tra1.0g of caffeine with two 30-mL portions of chloroform over that of of a single-step extraction(KD = 8.36 at 25 degrees C)
a gas mixture with a total pressure of 770 mmHg contains each of the following gases at the indicated partial pressures: CO2, 122 mmHg; Ar, 209 mmHg; and O2, 191 mmHg. The mixture also contains helium gas. what is the partial pressure of the heliu
Mass Mol Atoms Moles Mol Mass Moles Atoms g mol Atoms Moles How many atoms are in 1 g of What is the mass of 1 the substance shown below? Mole of the substance shown below? 10 g of the substance below equals how many moles?
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Are people who today for a return to the gold system simply nostalgic or do they have a point? Explain your logic. Was the Bretton Woods system bound to fail?
What forces (tradition, practice, and policy) would direct your organization's public response if something horrible occurred at 4:38 this afternoon?
Select one of these barriers that you have experienced, either as a speaker or a member of the audience, and discuss how it affected the presentation.
Choose a company, organization or public person that you believe needs a "brand update" and describe how you would update their brand.
Problem: Describe a statement of critical 'you' language you used this week. Reword the statement as a descriptive 'I' language statement.
Question: Detailed review on each paragraph, what are the strengths and weaknesses you see?
Problem: What are communication "red flags" that prevent someone from pursuing a relationship (romantic or otherwise) with an individual?