Sample of a gaseous hydrocarbon
Question: A 1.5 gram sample of a gaseous hydrocarbon has a volume of 820 ml when measured at 227 degrees Celcius and 2.50 atm. Which of the following is the formulas for the gas?
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A black precipitate remaining from the seperation of Cr^3+ and Fe^2+ ions is dissolved in HCl and HNO3. Some NH3 is added, followed by several drops of dimethylglyoxime. (a). A colorless solution results, What do you think happened.
Mass of magnesium: 0.6 g Moles of magnesium. Mass of magnesium oxide: 1.00 g Moles of magnesium oxide
How to verify the amount of pure gold in an irregularly shaped object (e.g., a crown) by placing it in water. How much water should be displaced by a pure gold object having a mass of 1.59 kg?
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5. Enter your answer with 2 decimal places. Enter scientific notation as 1.23E4.
When 85.00 mL of 0.250 M Ca(OH)2 (aq) and 15.00 mL of 0.750 M Pb(NO3) (aq) are mixed together in a beaker a yellow precipitate is formed. Assume all heavy metal hydroxides are insoluable
The normal boiling point of water is 100.0 degrees C and its molar enthalpy of vaporization is 40.67 kJ/mol. What is the change in entropy in entropy in the system in J/K when 39.3 grams of steam at 1 atm condenses to a liquid at the normal boilin
Find the conditional formation constant for Ca(EDTA)2- at pH 9.00, where log Kf is 10.65 and ?Y4- is 0.041.
How much NaOH in grams is needed to prepare 546 mL of solution with a pH of 10.00? The molecular weight of NaOH is 40.0 g/mol. Hint: Since NaOH is a strong base it ionizes (disassociates) completely. The OH- concentration equals the initial concen
What is the pH of a solution made by mixing 100.00 mL of .20 M HCl with 50.0 mL of .10 M HCl. Assume that the volumes are additive
What is the volume in mL of 0.185 M HCl(aq) needed to reach halfway to the equivalence (stoichiometric) point in the titration of 47.0 mL of 0.196 M N2H4(aq) (Kb = 1.7 x 10^-6).
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