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1. H2CO3 (carbonic acid) is a polyatomic acid. State the equations showing the successive dissociations.
2. For a 0.6M NH41+ solution, compute H+, pH, and [OH-].
3. For a 0.8M solution of H2CO3, compute [H+] , [HCO32-], pH, pOH and [OH-].
indicate whether the process is always spontaneous, never spontaneous, spontaneous at high temperature or spontaneous at low temperature.
how many grams of potassium are present in 13.6g of K2Cr2O7
An object is coated with a layer of chromium that is 0.015 cm thick. If the object has a surface area of 15.3 cm squared, how many atoms of chromium are used in the coating. The density of chromium is 7.19 g/cm cubed.
The decomposition of N2O to N2 and O2 is a first order reaction. At 730 degrees Celcius the half-life of the reaction is 3.58x10^3 min. If the initioal pressure of N2O is 2.10 atm at 730 degrees Celcius, calculate the total gas pressure after on h..
laws of thermodynamics. Why is there no law for the conservation of entropy?
Which of the following options give the correct relationships between the decimal prefixes? Select all that apply. Pay close attention to the sign and magnitude of exponent. -1 mL= 1x10^3 microliters -1GHz=1x10^6 Hz -10^3 kg=1 g -10^9 nm=1m -10ps=..
Would you expect the carotenoid pigment fraction to come off sooner or later than it did with 95:5 Hexane:Acetone? What effect would you expect if you used 100% hexane instead
If a hydrogen-like atom in the ground-state is excited with a wavelength of 397.21nm, how much energy has been absorbed. Which shell is the electron excited to
What name (label) is given to the hybridized orbitals of SF6. Explain how this label applies to the orbitals of the free atoms.
what is the molar mass of a gas which has a density of 1.16g.l-1. at stp ? if this gas is a hydrocarbon with 92.2carbon
For the following molecules and ions, draw a Lewis structure, calculate formal charges for each atom, and determine the oxidation number for each atom.
how many grams of propane must be burned in order to convert2.32moles of water at 56.0 oc to steam at 100.0 the
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