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Common sugar or sucrose is a nonvolatile substance of formula C12H22O11. Two teaspoons of sugar in a cup of coffee correspond roughly to 10 g of sugar dissolved in 200 g of water. What is the MOLE FRACTION of sugar in such a solution?
A gaseous mixture of rm O_2 and rm N_2 contains 36.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 485 mmHg?
3.5 g of a hydrocarbon fuel is burned in a vessel that contains 250. grams of water initially at 25.00 C. After the combustion,the temperature of the water is 26.55 C.
Among the non metallic elements, the change in atomic radius in moving one place left or right in a row is smaller than the change in moving one row up or down. Explain these observations.
Calculate the mass percent of a solution that is prepared by adding 32.2 g of NaOH to 262 g of H2O.
Calculate the heat given off when 177 g of copper cools from 155.0 Celsius to 23.0 Celsius. The specific heat capacity of copper is .385 J/g C
A flask contains 0.250 mol of liquid bromine, Br2. Determine the number of bromine molecules present in the flask.
Calculate the number of moles of an ideal gas if it has a pressure of 1.02 atm, a volume of 2.76 L, and a temperature of 222 oC. Use R = 0.0821 L-atm/mol-K for the value of the gas constant.
For the titration of 30.00 mL of 0.5000 M acetic acid with 0.5000 M NaOH, calculate the pH before you add the NaOH a) before the addition of any NaOH solution.
A solution is prepared by dissolving 18.536g of calcium nitrite in 183.544g of distilled water. Calculate the boiling and freezing points of this solution.
Find the weight percent copper in the salt. Would you help me to sort out this question? A 3.026 gram portion of Cu(II) salt was dissolved in a 250 ml volumetric flask. A 25.0mL
Just based on the orbital occupancy of electrons, is it justifiable to distinguish between the transition and inner transition elements. Should we consider any other factors
When 24.0 g of glucose (a nonelectrolyte) are dissolved in 500. g of water, the solution has a freezing point of -0.47°C. What is the molar mass of glucose? Kf of water is 1.86°C/m.
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