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1)Dinitrogenmonoxide (N2O), laughing gas, is used by dentists as an anesthetic. If 2.86 molof gas occupies a 20.0 L tank at 23°C, what is the pressure (mmHg) in the tank in the dentist office?
2)• If I have 4 moles of a gas at a pressure of 5.6 atmand a volume of 12 liters, what is the temperature?
3)• If I have 165.5g of an unknown quantity of gas at a pressure of 1.2 atm, a volume of 31 liters, and a temperature of 87 0C:
•A. How many moles of gas do I have?
•B. What is the identity of the unknown?
Determine the maximum number of electrons that could be emitted from metal by a burst of light with a total energy (E)of 9.86× 10^(-7) Joules?
What mass of silver chloride can be prepared by the reaction of 130.0 mL of 0.15 M silver nitrate with 190.0 mL of 0.30 M calcium chloride?
The Cu-Ni system is an isomorphous one, meaning that the crystal structure does not change with alloying; in particular, Cu and Ni atoms randomly substitute for one another within a FCC crystal structure
The initial concentration of some weak acid, HA, in an aqueous solution is 0.2150 M, at equilibrium the concentration of HA becomes 0.0955 mol/L.
What tripeptide would be synthesized from the informational strand of DNA with the sequence 5' GTATCCAGT?
Calculate the molarity of an aqueous NaOH solution if 30.10ml of .500M H2SO4 is required to reach the end point when titrated against 10.00mL of NaOH solution.
What mass of NH4Cl should the student dissolve in the solution to turn it into a buffer with pH =8.77
For the reaction, calculate how many moles of the product form when 0.048 moles of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Fe + 3O2 ---> 2Fe2O3
An evacuated (empty) 276 mL glass bulb weighs 129.6375 g. Filled with an unknown gas, the bulb weighs 130.0318 g. Calculate the gas density in g/L.
Calculate how many grams of Ni2+ are present in 3.36 moles of nickel(II) fluoride(NiF2) and also determine the number of moles of F- ion are present in 4.82 grams of nickel(II) fluoride.
the activation energy for the isomerization of methyl isonitrile is 160 kJ/mol. Calculate the fraction of methyl isonitrile molecules that has an energy of 160.0 kJ or greater at 500 K.
the maximum velocity of the ejected electrons is 3.45 multiplied by 105 m/s. Calculate the binding energy of electrons to the magnesium surface.
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