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When 45.0 g of an unknown nonvolatile nonelectrolyte is dissolved in 500.0 g of water, the resulting solution freezes at -0.930 °C. What is the molar mass of the unknown substance? Kf = 1.86 °C/m for water.
What is the final volume on the right side?- What is the final temperature on the right side?- What is the final temperature on the left side?
How many grams of baking soda, NaHCO3, are needed to react with 205 mL of stomach acid having an HCl concentration of 0.07378 M. The reaction is NaHCO3(aq) + HCl(aq) ? NaCl(aq) + CO2(g) + H2O(l).
c3h8g 5o2g-gt 3co2g 4h2ol ho -2220 kjmolpropane is often used for gas grills and is typically purchased by filling a
A vinegar sample contained 5.20 % acetic acid. How may mL of 0.450 N sodium hydroxide would be required to titrate 25.00 mL of the vinegar sample
List the molecular geometry and the electron pair arrangement of all possibilities that would give a polar molecule when all the surrounding atoms are identical.
150 mL 0.1M NaOH is added to 200 mL 0.1M formic acid. 650 mL of H2O is then added to give a 1L solution. What is the pH of this solution?
What is the NMR spectrum of benzene, Suppose Dewar,Ladenburg,and Kekul?? had had a 13 C NMR spec- trometer.How many signals would the various candidates
1.a 0.187g sample of a co3-2 antacid isdissolved with 25.0 of 0.0984 m hcl. the hydrochloric acidthat is not
The following results were obtained for the determination of sulfur in another coal sample. The average for 3 trials was 2.28 %S. Report the 95% confidence limits for the average sulfur content in this sample based on the knowledge from extensive ..
Given Heisenbergs uncertainty principle, how can it be that it is so important for quantum mechanics, but not much of a concern for our every day actions
100.0 ml of 0.100 M acetic acid is placed in a flask and is titrated with 0.100 M sodium hydroxide . An appropriate indicator is used. Ka for acetic acid is 1.7 x 10 -5. Calculate the pH in the flask when no NaOH has been added.
10 mol/s of liquid benzene at 20°C and 1 bar is pumped to 5 bar. At the inlet conditions, the molar volume of benzene is 11.8 liter/mol. Estimate the outlet temperature of the benzene and the work done by the pump in kW. What assumptions have you ..
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