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When 0.6 g of impure zinc reacted with an excess of hydrochloric acid, 135 mL of hydrogen was collected over water at 10?C. The external pressure was 745.4 Torr. What volume would the dry hydrogen occupy at 1 atm and 298 K? The vapor pressure of water at 10?C is 9.21 Torr.
the decomposition of n2o to n2 and o2 is a first order reaction. at 730 degrees celcius the half-life of the reaction
What is the molecular formula of the compound? , draw Structures for the molecule (1 bonus mark for every acceptable structure, up to a maximum of 5 bonus marks).
A solution contains 0.0470 M Ca2+ and 0.0292 M Ag+. Can 99.00% of Ca2+ be precipitated by sulfate, without precipitating Ag+ (For CaSO4, Ksp = 2.4 10-5. For Ag2SO4, Ksp = 1.5 10-5.) Yes or No What will be the concentration of Ca2+ when Ag2SO4 begi..
a quanity of gas exerts a pressure of 98.6 kpa at a tempature of 22 degrees celcius. If the volume remains unchanged, what pressure will it exert at -8 degrees celcius
Combustion analysis of naphthalene, a hydrocarbon used in mothballs, produced 8.80 g CO2 and 1.44 g H2O. Calculate the empirical formula for naphthalene?
The molar heart of neutralization from hydrochloric acid and sodium hydroxide is -57.3 kJ/mol. Use this accepted value to predict the heat evolved during the neutralization of 655mL of 1.00 M hydrochloric acid by 1.00 M sodium hydroxide
Which of the following gases at 500 K would show most ideal behavior?
Calculate the molar solubility of FeCO3 . How many grams of FeCO3 are present in 15.0 L of a saturated solution.
Which of the following pairs of molecules is listed in order of decreasing net dipole moment (from more polar molecule to less polar molecule)
What is the heat of vaporization(kJ/mol) if it takes 3,452 J of heat to completely vaporize 2.68 moles of the liquid at its boiling point?
Prepare a standard of lidocaine in methanol with a final concentration of 1.00 mg/mL using the powder lidocaine/HCl. Show the calculations and explain how you take the salt form into account.
consider a hydrogen atom in the ground state. what is the energy of its electron? Now consider an excited- state hydrogen atom. what is the energy of the electron in the n=2 level
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