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Explain the following species are isoelectronic with the noble gas krypton. Arrange them in order of reduce radius: Rb+ Y3+ Br- Sr2+ Se2-
Describe how you would prepare 1.000 L of 0.05M HEPES buffer @ pH 7.45 in the lab. You have pure HEPES, a pH meter, 1.00 M HCl and 1.00 M NaOH, and all of the pure water and glassware you need.
A gaseous oxide of nitrogen has an empirical formula of NO2. A 0.556 g sample of this gas in a 250. mL container at 24ºC exerts a pressure of 44.8 cm Hg. What is the molecular weight of the gas? What is the molecular formula of the gas
initially a 1.0 l container is filled with 2.0 mol of no2. as the system approaches equilibrium what happens to the
What symbol is used in a chemical equation to represent the following phrases? Select the symbol in blue and drag it into the appropriate bin
The binding energy of electrons to copper metal is 389.3 kJ/mol. What is the longest wavelength of light that will eject electrons from copper metal? Enter units.
The reading on the tank pressure initially rises very quickly then much more slowly eventually reaching a value of 3.27 mpa. A ssume T final=19C. How many moles of air in the tank initially ?
A reaction was found to be second order in carbon monoxide concentration. The rate of the reaction ___________ if the [CO] is doubled, with everything else kept the same.
Which of the following substances would have a standard enthalpy of formation equal to O kj/mol. Select all that apply
What is the equilibrium concentration of HXY4 ^2- for a 0.15 M solution of the triprotic acid, H3XY4?
Make a flow chart on how a mixture of phenol, benzoic acid, p-nitroaniline and anthracene can be seperated by extraction
A reaction has a rate constant of 0.0810 sec-1, how much of the compound (in mol/L) is left after 0.752 min, if there was 0.303 mol/L at the start
A 97 gram solution of silver nitrate contains 14 grams of AgNO3. What is the percent by mass of silver nitrate in this solution?
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