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If 8.36 g of an unknown substance is dissolved in 233.5 g of water at 80 degrees Celsius. If the vapor pressure of water at this temperature is 355.1 mmHg. If the vapor pressure of the resulting solution is 348.6, explain what is the molecular weight of the unknown compound?
An unknown metal with a mass of 28g absorbs 58J of heat. Its temperature rises from 31.1C to 39.9C. Calculate the heat capacity of the metal ?
predict whether an aqueous solution of ammonium bicarbonate would be acidic, basic or netural. explain your answer, and support it with real data.
How would the ground-state energy levels of X and H compare and would the energy of an electron in the n = 2 level of H be higher or lower than that of an electron in the n = 2 level of X? Explain your answer.
How many resonance forms are required to represent the bicarbonate ion HOCO21
An airplane is pressurized to 650 mmHg, which is the atmospheric pressure at a ski resort at 13000 ft altitude: a) if air is 21% oxygen, what is the partial pressure of oxygen on the plan
When an ice cube is dropped into a Styrofoam cup containing 195 g of coffee at 97.0 oC, the thermal energy used to melt the ice is 2.1 kJ what is the final temperature of the coffee closest to ? (Assume a specific heat of 4.184 J/g oC for the coff..
in the titration of 25.00ml of 0.100M CH3COOH, calculate the number of milliliters of 0.200 M NaOH that must be added to reach a pH of a)3.85, b) 5.25,
What is the mol fraction Na2SO4 in a solution which is 11.5% by weight Na2SO4 (molar mass Na2SO4 = 142.06 g/mol and H2O = 18.016 g/mol)?
To what volume should you dilute 150 mL of an 8.00 M CuCl_2 solution so that 55.0 mL of the diluted solution contains 5.9 g CuCl_2
A certain weak base has a Kb of 7.80 × 10-7. What concentration of this base will produce a pH of 10.16
Given the following partial pressure for the gases: Pnz=0.78atm Po2=0.19atm Ptrace=0.05atm Determine the total pressure for the mixture.
write the balanced net ionic equation for the reaction that occurs when 0.1 m solutions of copperii sulfate and calcium
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