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Explain a vitamin tablet was dissolved in a 500mL flask. 50mL of this solution was transferred to a 100mL flask as well as filled to the line. Explain how many mg of Fe are in the tablet if the concentration of Fe is 2.83 g/mL in the 100 mL flask?
You have been asked to review the calculations of an assistant with respect to the calculation of the internal energy of CO2. The assistant looked up the enthalpy of CO2
Calculate the % atom economy for the following two methods for converting benzene, C6H6, to aniline, C6H5NH2.Method 1: C6H6 + (CH3)3SiN3 + 2 F3CSO3H + NaOH
Make a rough sketch showing how the following properties of a baseball depend on time, from the moment it is hit high into left field to the time it is caught by the outfielder. You may neglect the effects of friction!
Naturally occurring chlorine is composed of 35Cl and 37Cl. The atomic weight of chlorine is 35.453. What are the percentages of 35Cl and 37Cl in naturally occurring chlorine. Assume that the mass of 35Cl and 37Cl are 35 and 37 amu respectively.
2.0 moles of a nonelectrolyte solute are added to 1.0 kg of an unknown solvent. The freezing point is depressed by 7.9 K. Calculate the molal freezing point constant (Kf?) for this solvent.
A solution of H2SO4(aq) with a molal concentration of 3.22 m has a density of 1.183 g/mL. What is the molar concentration of this solution
Some of the ice melts and cools the water to 0 degrees celsius. When the ice and water mixture has come to a uniform temperature of 0 degrees celsius, how much ice has melted
The pH of a bicarbonate-carbonic acid buffer is 7.80. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-).
Estimate dissociation energy of HF using simpe additivity rule If given that d(H-H) and D(F-F) IN H 2 is 336kj/mol and F2 is 258 kj/mol
How much water must be added to 534. mL of 0.180 M HCl to produce a 0.135 M solution? (Assume that the volumes are additive.)
A sample containing .221g Cl is dissolved in 50.0mL of water. How many moles of Cl ion are in the solution?
Explain a balloon has a volume of 1.20 L on a warm 32 ºC day If the same balloon is placed in the freezer and cooled to -18 ºCm what volume will it occupy
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