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When canning jams and jellies, a small air space is left between the top of the jam and the jar lid, which is only loosely tightened. The jar may then be submerged in boiling water for several minutes. During this time, bubbles are observed emerging from the jar. After the jar is removed from the hot water, the lid soon pops down tightly on the jar and seals it.
a. Explain why bubbles are observed to emerge from the jar when it is in the boiling water.
b. Explain why the lid "pops down" on the jar top soon after removing the jar from the boiling water.
Determine the molarity of Fe+3 ions and SO4-2 ions in a solution prepared by dissolving 48.05g of Fe2(SO4)3 in enough water to make 800.0mL of solution.
Electrons are ejected from sodium metal by any light that has a wavelength shorter than 544 nm. What is the kinetic energy of an electron
If p-nitroacetanilide is hydrolysed in acidic solution, why does hydrolysis not take place during the nitration with HNO3 and H2SO4.
The heat of combustion of cyclobutane is 650.3 kcal/mol. How much energy is released during the complete combustion of 450 grams of cyclobutane.
Calculate the temperature of the system once equilibrium has been reached. Assume that CP,m for Au(s) and H2O(l) is constant at their values for 298 K throughout the temperature range of interest.
How many types of nonequivalent protons does the following compound contain
Copper has two naturally occurring isotopes,63Cu (isotopic mass 62.9396 amu) and 65Cu (isotopic mass 64.9278 amu). If copper has an atomic mass of 63.546 amu, what is the percent abundance of each isotope?
What volume (in milliliters) of 0.190 M NaOH should be added to a 0.135 L solution of 0.022 M glycine hydrochloride
which is used as a sugar substitute, is produced by the reduction of D-xylose. Draw xylitol. show all hydrogen atoms, and connect the appropriate atoms using bonds
A chemist wants to prepare a solution with a freezing point of 22.0°C and has 100.00 g of glycerol on hand. What mass of water should the chemist mix with the glycerol?
2ZnS + 3O2 = 2ZnO + 2SO2 how many moles of Zno are produces when 32 gms of oxygen is allowed to react with an excess of ZnS?
The reaction between solid sodium and Iron (III) oxide is one in a series of reactions that inflates an automobile airbag.
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