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Question- What is the molecular weight of a polymer if 3.50g are dissolved in enough water to give 252 mL of the solution and give a osmotic pressure of 28.52 mm Hg at 25 degree C.
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Calculate the partial pressure of each gas and the total pressure if the temperature of the gas is 17?C.
The solubility of radium oxalate RaC2O4 in warm water is 0.0174 mols/Liter. Calculate Ksp for this compound. Radium is a 2nd column element somewhere below calcium.
A stream of air enters a 7.50-cm ID pipe at a velocity of 60m/s at 27C and 1.80 bar (gauge). At a point downstream, the air flows through a 5.00 cm ID pipe at 60C and 1.53 bar (gauge). What is the velocity of the gas at this point
In each of the following groups of substances, pick the one that has the given property. Explain your reasoning for each.
Explain how you known. Use Lewis dot drawings as part of your explanation. Ag+ + 2NH3 --> [Ag(NH3)2]+
Heat is lost to the styrofoam calorimeter. Assuming a 6.22 C temperature change for the reaction of HCl(aq) with NaOH(aq), calculate the heat loss to the inner 2.35-g styrofoam cup. The specific heat of styrofoam is 1.34 J/gC.
Explain how does doubling the preliminary concentration of iodine, while keeping all others constant, affect the initial rate
6HF + SiO2 => H2SiF6 + 2H2O Delta Hrxn = -670kJ/mol, What is the enthalpy change if the feed into a reactor contains 3 mol HF and 1.5 mol SiO2
7.50 mL of 0.125 M HCl is added to the 100.0 mL of the buffer solution. Calculate the new [NH3] and [NH4Cl] for the buffer solution. Calculate the new pH of the solution.
What is the pH of a phosphate solution made by the addition of 2.5 equivalents to an initial solution of phosphoric acid. The three pKa values of phosphate
If equal masses of H2 and O2 (100.0 grams each) are reacted together to produce water, how many grams of water could be produced.
A student plans to titrate 25.00ml of a 0.134M HNO3 solution with a 0.179M NaOH solution. Calculate the volume of NaOH(in ml) that will be needed to reach the equivalence point and anticipated pH.
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