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An object made of aluminum has a mass of 8.37g. When it was placed in a graduated cylinder containing 20.0mL of water, the water level rose to 23.1mL. Calculate the density and specific gravity of the object.
What is the composition in mole fractions of a solution that has a vapor pressure of 39 at 20 ? Express your answer using two significant figures.
The equilibrium constant KC for the reaction 2H2(g) + CO(g) ? CH3OH(g) is 135 at a certain temperature. If there are 5.23 ? 10?2 moles of H2 and 3.73 ? 10?
Every measurement has a measurement uncertainty. Discuss how precise and accurate measurement can be achieved in spite of the inherent measurement uncertainty.
The solubility of sodium chloride in water is 35.7 grams per 100 mL at 0 degrees celsius. What is the maximum amount of sodium chloride that will dissolve in 250 mL of water at 0 degrees celsius?
Important information about Quant problems, Calculate pFe2+ at Ve in the titration of 25.00 mL of 0.02026 M EDTA by 0.03855 M Fe2+ at pH
For the gas-phase reaction 2 NO2 + F2 → 2NO2F, the rate constant k is 38 M-1s-1 at 27° C. The reaction is first order in NO2 and first order in F2.
The % of antifreeze should be raised to twenty five percent by draining some of the mixture and adding 100% antifreeze determine how much mixture should be drained?
Calculate the molar concentration of uncomplexed Zn2+ in a solution that contains 0.20 mole of Zn(NH3)42+ per liter and 0.0116 M NH3 at equilibrium.
If 72.4 kJ of heat is supplied to a 852 g block of metal, the temperature of the metal increases by 9.6°C. Calculate the specific heat capacity of the metal in J/g·°C.
What volume of pure oxygen gas (O2) measured at 546 K and 1.00 atm is formed by complete dissociation of 0.7 mol of Ag2O? 2 Ag2O(s) → 4 Ag(s) + O2(g)
show the calculation for the percent yield of K3[Fe(C2O4)3].3H2O using your actual yield and the theoretical yield
How many grams of water can be cooled from 34°C to 26°C by the evaporation of 81 g of water? (The heat of vaporization of water in this temperature range is 2.4 kJ/g. The specific heat of water is 4.18 J/g·K.)
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