Describe the patterns in the electronic configurations of the elements. Each row across the periodic table is called a period and the elements gradually change properties from left to right. Can you explain this in terms of the electronic configurations? Each column of the periodic table is called a family. Elements in t
Lab Experiment: Interactive Valence Shell Electrons 1. You will need a bag of colored candies such as "Skittles" or "M&M" You should have at least 80 pieces of this candy. You will also need eighteen index cards. Nine sheets of notebook paper torn in half will work as well as index cards. 2. Separate the candies by color.
The question arises concerning the density of saltwater: is it because water molecules have moved out of the system, replaced by sodium and chlorine ions, which are heavier, or have the ions moved into the interstices, creating a greater number of particles in the solution? By the gas laws, a cubic meter of gas always maintain
Chlorine gas can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid: MnO2(s) + 4HCl(aq) --> MnCl2(aq) + 2H2O(l) + Cl2(g) How much MnO2 should be added to excess HCl to obtain 275mL of chlorine gas at 5.0C and 650 mmHg?
1. Write a balanced net ionic equation for the reaction of each of the following compounds with water. (a.) Na3PO 4 (b.) NaHSO4 (c.) (CH3)3NHCl 2. The following species are amphiprotic. Write the formulas of the corresponding conjugate acids and bases: (a.) HSe- (b.) PH3 (c.) HPO32- 3. For each of the following nona
How could you separate tellurium dioxide, TeO2 from silicon dioxide SiO2?
This is my chapter review quiz. Please provide only the answers, becuase I can check them myself in my chapter. ------- Chemistry Quiz 3: Multiple Choice Questions 1) Chemical equilibrium means all chemical reactions have stopped. (a) True (b) False 2) A half-reaction means that only half of the limiting reacta
I am having trouble drawing the unit cell and labelling the symmetry elements.
Use the Solubility Rules to write net ionic equations for the reactions that occur when solutions of the following are mixed. Instructions 1. Write reactants and products in the following order: Cation + Anion = Precipitate 2. Use "->" (hyphen + greater than) to indicate 'yields' 3. Write subscripts as numbers with no
The half life of Cl is 9.5 x 10(exponent 12)s. How many atoms of Cl are present in a sample with an activity of 1.5 x 10(exponent 9) atoms/s a. 2.1 x 10(exponent 22) atoms b. 6.3 x 10(exponent 3) atoms c. 4.9 x 10(exponent negative 23) atoms d. 1.4 x 10(exponent 22) atoms e. 7.0 x 10(exponent 23) atoms
Write the electron configuration for Ba, atomic number 56.
What is the change in G at 55 degrees Celsius for a reaction with a change in H=124kJ and change in S = 83.1J/K?
An electrolytic cell is used to plate silver from a silver nitrate solution onto an electrode. How many seconds are required to deposit 5.0g of silver if the current is kept constant at 2.0 amperes? Assume 100% current efficiency.
What is the correct cell notation for the reaction below: Cd2+(aq)+Zn(s)-->Cd(s)+Zn2+(aq)
What is the concentration of Hg2(exponent 2 positive) in a saturated solution of Hg2Cl2 if Ksp=1 A 10 (exponent negative 18)?
For AgCl, what will occur if 250ml of 1.5 A 10^-13 M of NaCl is mixed with 250mL of 2.0 A 10^-7 M of AgNO3? a. A precipitate would form because Ksp>P b. A precipitate would form because P>Ksp c. No precipitate would form because Ksp>P d. No precipitate would form because P>Ksp e. No precipitate would form because P=Ksp
How many geometric isomers exist for FeCl4(CN)2(exponent 3 negative)?
How many geometric isomers exist for Cu(en)Br2?
The formation constant for Cu(NH3)4(exponent 2 positive) is 2x10(exponent 12). What is the ratio of Cu(NH3)4(exponent 2 positive) to Cu(exponent 2 positive) in 0.1M NH3?
The crystal field splitting energy for TiF6^-3 is 203 kJ/mol. At what wavelength does the maximum absorbance of light occur for this complex?
Question: Determine the number of unpaired electrons in an octahedral, strong-field Co(exponent positive 2) complex ion.
Identify the ligands and their charges in Co(en)2(CN)2+.
What is the correct formula for a nickel(II) complex which contains 4 ammonia molecules and 2 water molecules?
What is the net ionic equation for the aqueous reaction of ammonium chloride with sodium hydroxide?
There are two beakers each with distilled water. One has trihydrogen borate + potassium hydroxide (H3BO3 + KOH) and the other has trihydrogen borate + sodium hydroxide (H3BO3 + NaOH). What are the products that are formed after the solutions are heated and placed in an ice water bath? Hint: There will be a precipitate.
Describe how you would predict whether a precipitate will form when two solutions are mixed. Start with the minimum information needed and then show how you would make the prediction. Assume a constant temperature of 298 K and that the volumes of the two solutions are additive.
1. What is the name of the following compounds? a) SO2 b) NO2 2. Name the shapes of these molecules? a) sulphur dioxide b) sulphur hexafluride 3. Write the electronic configuration of a) N2+ b) F- c) O2-