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Dental amalgam, a solid solution of silver and tin in mercury, is used for filling tooth cavities. Two of the reduction half-reactions that the filling can undergo are
3Hg2 2+(aq) + 4Ag(s) + 6e- ---> 2Ag2Hg3(s) Eo = +0.85 V
how is the rate of consumption of O2 related to the rate of consumption of NH3 in the reaction 4NH3 + 5O2 -->4NO +6H2O?
Why is the Lewis structure of SeO2 one single bond and one double bond. Wouldn't it make more sense to have two double bonds and a lone pair on Se so the formal charge of it becomes 0
for each of the following changes at equilibrium, indicate whether the equilibrium shifts toward products or reactants or does not shift: a)increasing the temperature. b)adding C(s). c)removing CO(g) as it forms. d)adding H2O(g). decreasing the vo..
A sample of 0.50 g of anhydrous CoCl2(subscript) is dissolved in 25.0 mL of water. Predict the absorbance at 510 nm for this solution, determining using the procedure described in this experiment.
Assuming that all of the gas in a helium tank containing 500g of He is used to fill balloons with an average volume of 2.5L of Helium, approximately how many balloons could be filled at STP
Why does the same amount of liquid when left in a wider and flatter container evaporate quicker than when left in a narrower and deeper container?
A 388 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 640. mmHg. Calculate the moles of Ar present.
The composition and amount of each phase present at 726°C, and (e) the composition and amount of each micro constituent present at 726°C.
Common oxidation states of mercury are 1 and 2. In the 1 oxidation state, mercury forms a diatomic cation. In the 2 oxidation state, mercury is a typical monatomic cation.
If 1.020g of KHC8H4O4 (204.23g/mol) is completely neutralized with 0.200 M KOH, what volume of potassium hydroxide is required. KHC8H4O4(aq) + KOH(aq) -(arrow to the right) K2C8H4O4(aq) + 2 H2O(1)
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 40 of water for your group
The standard free energy of activation of a reaction A is 76.9 kJ mol-1 (18.4 kcal mol-1) at 298 K. Reaction B is one hundred million times faster than reaction A at the same temperature
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