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What is the heat change of a 25 g block of iron that starts at a temperature of 22 degrees C and increases to 79 degrees C?
Carryout the following conversions. Report your answer to the correct number of significant figures
What is the buffer component ratio, ([CH3CH2COO-]/[CH3CH2COOH]) of a propanoate buffer that has a pH of 4.49. Ka of CH3CH2COOH is 1.3 x 10-5.
What is the heat change in J associated with 73 g of solid butane at -147 C changing to liquid at -109 oC?
Five hundred liters of a gas are cooled from 20°C to 10°C while the pressure remains constant.what the new volume will be?
Calculate the pH of a solution prepared by mixing 250. mL of 0.174 m aqueous HF (density = 1.10 g/mL) with 38.7 g of an aqueous solution that is 1.50% NaOH by mass (density = 1.02 g/mL).
Express the concentration of a 0.0720 M aqueous solution of fluoride, F-, in mass percentage and in parts per million
This solution has an osmotic pressure of 2.60 atm at 25°C. If each molecule of the solute dissociates into two particles (in this solvent), what is the molar mass of this solute?
Determine the molar mass of aspartame and How many moles of molecules are in 10.0g of aspartame?
Finding the solubility product - Ksp - of a solution of PbI2, A 1.00 L solution saturated at 25 decrees Celsius with lead (II) iodide contains 0.54 g of PbI2
What is the enthalpy of this reaction? Assume that no heat is lost to the surroundings or to the coffee cup itself and that the specific heat of the solution is the same as that of pure water.
What is the molar solubility of BaF2 in 0.15M NaF at 25 degrees celsius? Compare the solubility in this case with that of BaF2 in pure water.
P4(s) + F2(g)-> PF3(g) What mass of F2 is needed to produce 187 g of PF3 if the reaction has a 80.1% yield?
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