Notations

If OTA 104289 is available, please assist. Compare the elements B, Al, C, and Si. a)Which has the most metallic character? b)Which has the largest atomic radius? c) Which has the most negative electron affinity? d) Place the three elements B, Al, and C in order of increasing first ionization energy. ________ _ ...continues

Cell Potential

Calculate the standard cell potential for each of the following electrochemical reactions: a) the reduction of Sn(IV) to Sn(II) by Zn(s) b) the oxidation of Sn(II) to Sn(IV) by dichromate ion in acid solution c) the reduction of NO3- (negative sign there is superscript) to NO by cobalt metal

Balance by half reaction method in acid solution- show all work

Cr(NCS)6<4->(aq) + Ce<4+> (aq) = Cr<3+> (aq) + Ce<3+> (aq) + NO3 <-> (aq) +CO2(g) + SO4<2-> (aq) Show all work

Redox Reactions

Balance the following redox reactions: a) MnO2 + Cl- (negative sign is superscript) + H2SO4 --> MnSO4 + Cl2 + H2O + SO4 2-(2- is superscript) b) C12H22O11 + HNO3 --> H2C2O4 + NO2 + H2O c) K2Cr2O7 + C3H7OH + H+ (positive sign is superscript) --> Cr3+ (3+ is superscript) + CO2 + K+ (superscript) + H2O

A study of pH lab related

LAB 7: PRE-LAB (MAKE-UP LAB) 1. 10.00 mL of 0.1000 M NH3 was diluted with distilled water to 40.00 mL. Calculate the pH of the dilute solution. (Kb NH3 = 1.8*10^-5) 2. The dilute solution was titrated with 0.0500 M HCl. Write the equation for the reaction between ammonia and hydrochloric acid. Calculate the pH of th ...continues

Chemical Equilibrium

In which of these closed containers is the vapour pressure the greatest? Please explain your choice. a.) a 1L container with 5mL of water held at 20C b.) a 2L container with 15ml of water held at 30C c.) a 3L container with 500ml of water held at 25C

molarity of solution

see attached

Atom

Select the atom or ion in each pair that has the larger radius. Cs or Rb larger radius__________ Br or As larger radius__________ What is the maximum number of electrons that can be identifies with each of the following sets of quantum numbers? In some cases, the answer may be "none." In such cases, explain why "n ...continues

Atomic Emission Spectra

For the hydrogen spectrum, how do you find the wavelength (experimental value in nm) from a graph? I don't understand what exactly you are plotting and how to get the wavelength from the graph. For example if your scale readings are: Violet-4.5, Blue-5.0, Yellow-6.0, Red-6.6 The same question applying to the spectra of catio ...continues

Atomic Emission Spectra

For each line in the hydrogen spectrum, how do you deduce n2 (the upper state) and n1 (lower state)? If you could record the absorption spectrum of hydrogen gas, what would it look like? What is the vapour (or gas) present in fluorescent lights? How do you know?