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1. The molality of a solution prepared by dissolving 29.5 g of H2SO4 in 2.00L of water
2. The mole fraction of each component of a solution prepared by dissolving 2.00 g of nicotine, C10H14N2 , in 77.5 g of CH2Cl2
3. Dissolve 0.770 mol of citric acid, C6H8O7, IN 1.00 kg of water
4. Dissolve 0.170 mg of KBr in 5.00 mL of water
5. Dissolve 5.80 g of aspirin, C9H8O4, in 145g of dichloromethane, CH2Cl2
Lakes that have been acidified by acid rain can be neutralized by liming, the addition of limestone (CaCO3 ). How much limestone in kilograms is required to completely neutralize a 3.8 x109 lake with a pH of 5.5.
An unknown compound contains carbon, hydrogen, oxygen, and sulfur atoms. When a 10.00 mg sample of the unknown compound was combusted, it produced 16.27 mg of CO2, 5.55 mg of water, and 7.90 mg of SO2. What is the empirical formula of the unknown ..
Calculate the heat evolved when 306 g of white phosphorus (P4) burns in air according to the equation below.
Suppose you wished to control the PO43- concentration in a solution of phosphoric acid by controlling the pH of the solution. If you assume you know the H3PO4 concentration, what combined equation would be useful for that purpose? Include physical..
Provide calculations and explain how 100 ml of 0.5 M NaCl in 25 mM sodium phosphate buffer, ph 8, will be prepared.
If a 1.120 mole sample of a compound has a mass of 13.93g Explain what is the molecular formula of the compound
The space shuttle orbiter utilizes the oxidation of methyl hydrazine by dinitrogen tetroxide for propulsion. 4 N2H3CH3(l) + 5 N2O4(l) 12 H2O(g) + 9 N2(g) + 4 CO2(g) Calculate ?H° for this reaction. in kJ
Question- A 3.00 mole quantity of NOCl was initially in a 1.50 L reaction chamber at 400 C. After equilibrium was established, it was found that 24.0 percent of the NOCl had dissociated: 2NOCl(g) 2NO(g) + Cl2(g) Calculate the equilibrium constant K..
What is the energy of a C-C bond in kJ/mole? Explain. How does this amount of energy compare?
If the vapor pressure of bromobenzene at 40C is 10mm Hg. Find out the phase of bromobenzene at 40C and 1atm.
What are the possible values of n and m/ (the principal and angular momentum quantum numbers) for an electron in a 5d orbital
Determine the functional form of Phi(t) and the frequency of a pendulum bob whose mass is m and is attached to a massess rod of length l. Assume that the bob oscillates in the limit of small oscillations.
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