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The boiling point of water is about 200 degrees Celcius higher than one would predict from the boiling points of hydrogen sulfide and hydrogen selenide. One may explain this apparent anomaly by which of the following?
Options:
Water is less polar than hydrogen sulfide and hydrogen selenide.
The intermolecular forces are much greater in water than in hydrogen sulfide and hydrogen selenide.
Water has the lowest molecular weight.
The H-O covalent bond is much stronger than the H-S and H-Se bonds.
The water molecule is lighter than the other two molecules.
The dried precipitate weighs 10.3g. Calculate the amunt of MgCl2 in the original sample (in weight percent).
A gas sample has an original volume of 680 ml when collected at 720mm and 28C. what will be the volume of the gas sample if the pressure increases to 820 mm and the temperature increases to 55C?
A molecule of N2 in air travels at about 1000 ft/sec. If the supersonic transport Concorde travels at 1500 miles/hour, how fast does it travel in ft/sec? (1 mile = 5280 ft)
determine the moles of product ( Fe for this reaction) made by both reagents. what is the limiting reagent?
A 1.30 g sample of dry ice is added to a 760 mL flask containing nitrogen gas at a temperature of 25.0 degrees Celcius and a pressure of 735 mmHg. The dry ice is allowed to sublime.
Propose stepwise sythesis of 2-cholor-4-nitrobenzoic acid starting from benzene
Calculate the molar solubility of AgCl in a solution made by dissolving 10.0 g of CaCl2 in 1.50 L of solution.
How many milliliters of a stock solution of 2.00M KNO3 would you need to prepare 100.0 mL of 0.150M KNO3?
What is the enthalpy change for converting 1.00 mol of ice at -50.0°C to water at 70.0°C? The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K and 1.84 J/g-K respectively. For H2O, Hfus = 6.01 kJ/mol, and Hvap= 40.67 kJ/mol.
which of the solutions included in this experiment could be used to distinguish between the pairs of solutions. In each case, describe the observations you would make and write a net ionic equation for any reaction that would occur.
It should shift to the right because the removal of a component causes the equilibrium to shift to the side from which the component was removed.
If 8.00 kJ of heat are added to 200. g of water at 20.0 C, what is the final temperature of the water?
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