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Two substances are mixed together. Define how the observer could determine if this reaction is just a mixture or an actual chemical reaction. Give an instance of two reactants that would form a mixture as well as two reactants that would form a chemical reaction
Nitrogen dioxide and water react to produce nitric acid HNO3 and nitrogen monoxide. 3NO2(g) + H2O(l) --> @HNO3(aq) + NO(g)
A voltaic cell is constructed in which the cathode is a standard hydrogen electrode and the anode is a hydrogen electrode (P(H2)= 1atm) immersed in a solution of unknown [H+].
In photosynthesis, plants use energy from the sun in combination with carbon dioxide and water to form glucose (C6H12O6) and oxygen. If 4.50 moles of water react with carbon dioxide, what mass of glucose is produced?
Would your calculation of the atomic mass of the metal be too high or too low if your hot metal sample cooled off, unbeknownst to you, while being transferred to the calorimeter
when you performed flame test on the chloride salts of several metallic elementyou undoubtedly noticed that each
The enthalpy of activation of a first order reaction is 123kj/mol. The rate constant at 80 C is 1.73x10^-2 s^-1. What is the rate constant at 35 C. (R=8.31 j/mol K)
What is the pH of the sodium phosphate buffer described in problem #1 if 1 ml of 10M NaOH is added? What is the pH of 1 liter of water if 1ml of NaOH is added?
Potassium-40 decays to argon-40 with a half life of 1.27E^9 yr. what is the age of the sample that has a mass ratio of 40 Ar to 40K of 0.712
What maximum mass of sulfur in kg could be produced by the reaction of 1.3 x 10 4(the 4th) m3 of SO2(g) with 2.5 x 10 4(the 4th) m3 of H2S(g), both at STP
What is the pH of the solution in the cathode compartment of the following cell if the measured cell potential
Calculate the quantity of energy produced per mole of -235 (atomic mass = 235.043922 ) for the neutron-induced fission of -235 to produce -137 (atomic mass = 136.9253 ) and -97 (atomic mass = 96.910950 ).
Refer to the periodic table and select the symbol of the element that fits each of the following descriptions: a) the group IVA/14 semimetal in the fourth period.
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