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Define when 0.593 g of an unknown solute is dissolved in 14.9 g of water; the freezing point is depressed by 1.74 Celsius degree. Evaluate the molecular weight of the unknown solute, assuming that it is a nonelectrolyte
If 125 cal of heat is applied to a 60.0 g piece of copper at 24C, what will the final temperature be? The specific heat of copper is 0.0920cal/(g x C).
Barium sulfate, , is used in medical imaging of the gastrointestinal tract because it is opaque to X rays. A barium sulfate solution, sometimes called a cocktail
calculate the minimum concentration of cr3 that must be added to 0.095 m naf in order to initiate a precipitate of
Write an equation for the Diels- Alder reaction of cyclopentadiene and 1,4 benzoquinone.
Why is it not possible to measure the reduction potential of a half-reaction independently; that is, why must one half-reaction always be couple with another half-reaction to generate a measurable voltage
Write a balanced net ionic equation for the reaction of each of the following aqueous solutions with H+ ions. Sodium fluoride
If ammonia is obtained in 90% yield based on hydrogen, how many tons of hydrogen are necessary to produce 100 Mg of ammonia
If the initial temperature of the water in the calorimeter was 20.25 °C, calculate the calorimeter constant (in J/K) for the coffee cup calorimeter.
What is the empirical formula of a compound containing C, H, and O if combustion of a 1.75g sample of the compound yields 2.56g of CO2 and 1.05g of H2O
Calculate the standard reaction enthalpy for the reaction above (as written) using the following data: N2(g) + O2(g) -→ 2 NO(g)
what is the flow rate of the gas stream leaving the condenser in mole/ min. hint first calculate the molar flow rate of the conensate and note that rate at which C6H14 an N2 enter the unit must equal to the total rates at which they leave in the t..
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 300mL of a solution
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