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H°f rxn for CO2(g) is -393.5 kJ/mol. The standard form of carbon is graphite. Find the fuel value in kJ/g for C(graphite). [Fuel value is amount of heat released in complete combustion of exactly one gram of fuel
Calculate the mole fraction of total ions in an aqueous solution prepared by dissolving 0.400 moles of MgCl2 in 850.0 g of water.
Draw the skeletal structure of all the peptides you can make combining one of each of these amino acids. Show your products in the unionized state and omit any stereochemistry.
the concentration of mg2 in a sample of water is 262 mmoll at what ph will 99 of the mg2 be precipitated as mgoh2? ksp
What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 52.0 mL of 0.631 M HCl and 63.0 mL of 0.723 M NaOH
How many grams of glucose (C6H12O6) must be dissolved in 563 gram of ethanol (C2H5OH) to prepare a 2.40 x 10-2 m solution?
discuss in detail the healthcare applications of chemical reactions. which chemical reactions would you consider to be
Ethylene glycol is used as automobile antifreeze. 6.38g og this compound contains 2.47g of carbon and 0.620g of hydrogen. The rest is oxygen. The molar mass is 62.0g/mole.
A soft drink contains an unknown amount of citric acid, C3H5O(COOH)3. 10.0ml of the soft drink requires 6.42 ml of 9.580 x 10^-2 M NaOH to reach the equivalance point in the following reaction.
At 46 C a sample of ammonia gas exerts a pressure of 4.27 atm. what is the pressure when the volume of the gas is reduced to one-fourth of the original value at the same temperature
write the expression for the equilibrium constant kc for the following chemical reaction?4h3oaq 2cl-aq mno2s mn2aq
A student sets up two reactions. Reaction 1 uses 0.170 mole/L of reactant, and Reaction 2 uses 0.460 mole/L of reactant. How many times faster is Reaction 2 compared to Reaction 1
A buffer that contains 0.49 M of the base, B, and 0.29 M of its conjugate acid, BH+, has a pH of 8.10. What is the pH after 0.0025 mol HCl is added to 0.25 L of this solution
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