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-