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An isotonic solution contains 0.90% NaCl by mass per volume. Calculate the percent mass per volume for isotonic solutions containing each of the following solutes at 25 degrees Celsius. Assume a van't Hoff factor of 1.9 for all ionic solutes.KClNaBr
a buffer is made using 45.0 ml of 0.750 m hc3h5o2 and 55.0 ml of 0.700 m nac3h5o2. what volume of 0.10 m naoh must be
After the reaction was comlete, the volume of the dry has produced was 1 liters at 75 degrees celsuis and 721 torr. what was the percent potassium notrate in the original sample?
if copper has a photoelectric threshold wavelength of 279 nm calculate the velocity ms of the electron emitted when
calculate the standard reaction enthalpy for the formation of boron trifluoride which is widely used in the chemical
a volume of 125 ml of rm h2o is initially at room temperature 22.0rmcircc. a chilled steel rod at 2.00rmcircc is placed
4388 M KOH solution reacts with 50.60mL of CH3COOH solution, what is the molarity of the acid solution?
Discuss how to find the molar mass of a compound, percent composition of the elements of a compound and how to determine the empirical and molecular formulas from percent composition.
An unknown volume of water at 18.2 degrees Celsius is added to 21.6 mL of water at 35.0 degrees Celsius. If the final temperature is 23.5 degrees Celsius, what was the unknown volume
Eventually, the water cools to 25.0 degrees celsius while the temperature in the room remains unchanged. Calculate deltaS(sys), deltaS(surr), and deltaS(univ) for this process.
A solution is prepared by adding 1.10 g of solid NaCl to 50.0 mL of 0.100 M CaCl_2. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.
calculate the standard enthalpy of reaction C6H6 (I) +3H2 (g)® C6H12 (I) from standard enthalpies of combustion of substances.
Calculate the pH of a buffer solution formed by adding 28.75 grams of sodium lactate (NaC3H5O3) to 450.0 mL of 0.550 M lactic acid (HC3H5O3) solution
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