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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.
A voltaic cell consists of a Hg/Hg2^2+ electrode(E degrees=0.85V) and a Sn/Sn^2+ electrode(E degrees=-0.14V). Calculate[Sn^2+]if [Hg2^2+]=0.36 M and Ecell=1.04V at 25 degrees C.
The temperature of a 35.2 g sample of iron increases from 23.7 C to 29.5 C. If the specific heat of iron is 0.450 J/g-K, how many joules of heat are absorbed.
is believed to follow the mechanism H2O2 + I- ? H2O + IO- fast H2O2 + IO- ? H2O + O2 + I- slow At 25oC, the first step is fast relative to the second step. What is the rate law predicted by this mechanism?
Write a net ionic equation, including states for teh reaction of Cobalt (II) Chloride and Silver Nitrate 2. Circle the species in which nitrogen has the highest oxidation number
An equilibrium mixture for the reaction above contains [H2] = 1.00 M, [N2] = 1.50 M, and [NH3] = 2.00 M. What is the value of the equilibrium constant, Kc, for the reaction?
Assuming no elasticity forces in rubber, what volume should a 1.0L ballookn at 25 degree Celsius and 1.00 atm pressure be if immerses in liquid nitrogen
Which absorption band is more intense; a band due to a single S-O bond or a band due to a single Si-C bond? 2) Compound A (C21H32) decolorizes a solution of bromine in CCl4
Dissolving 3.00 g of an impure sample of CaCO3 in an excess of HCl acid produced .656 L of CO2 (measured at 20 degrees C and 792 mmHg). calculate the percent by mass of calcium carbonate in the sample. State any assumptions.
what was the original total concentration of cesium and the corresponding radioactivity in Ci/L?
What volume of carbon dioxide is produced at 1 atm and 87 °C when 1.6 liters of methyl alcohol burns? What volume of liquid water is produced in this reaction?
What are the steps to recrystallize an impure solid? Answer 1. Heating the water. 2. Dissolving the solute.3. Letting the solute cool.4. Collecting and washing the crystals.
A 2.50 g sample of white solid was vaporized in a 345 mL vessel. If the vapor has a pressure of 985 mmHg at 180°C, what is the molecular weight of the solid.
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