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Quantum numbers are used to uniquely identify an electron in an atom. The Pauli exclusion principle states that no two electrons in an atom may have the same set of four quantum numbers
List a possible set of four quantum numbers (n,l ,ml ,ms ) in order, for the highest energy electron in gallium, . Refer to the periodic table as necessary.
Enter four numbers separated by commas (e.g., 3,2,-2,1/2).
a nitric acid solution containing 71.0 hn3 by mass has a density of 1.42 gml. how many moles of hno3 are present in
Calculate the pH if 0.100 M NaOH is added to 1.00 L of a buffer solution that is 0.400 M HCOOH and 0.100 M HCOONa. (Ka for HCOOH = 1.77 x 10-4)
Rank the given solutions in aquous form from lowest to highest boiling point:
Half-life equation for first-order reactions: where is the half-life in seconds , and is the rate constant in inverse seconds . Part A What is the half-life of a first-order reaction with a rate constant
what happens to the entropy of the system upon opening the valve between the flasks? 1. The entropy remains the same. 2. There is too little information to assess the change. 3. The entropy decreases. 4. The entropy increases.
An electric power station annually burns 3.3 107 kg of coal containing 2.4 percent sulfur by mass. Calculate the volume of SO2 emitted at STP.
PET studies require fluorine-18, which is produced in a cyclotron and decays with a half-life of 1.83 hours. Assuming that the F-18 can be transported at 60.0 miles/hour, how close must the hospital be to the cyclotron if 65% of the F-18 produced ..
0.10M potassium chromate is slowly added to a solution containing 0.50 M AgNO3 and 0.05 M Ba(NO4)2. What is the Ag+ concentration when BaCrO4 just starts to precipitate. The Ksp for Ag2CrO4 and BaCrO4 are 1.1 x 10^-12 and 1.2 x 10^-10 respectively..
If 115 of fluorine-18 is shipped at 8:00 a.m., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:30 p.m. ?
question it takes 46.0 j to raise the temperature of an 12.5g piece of unknown substance from 13.0 oc to 26.2 oc. what
Lead is a toxic metal that affects the central nervous system. A Pb contaminated water sample contains 0.0012 % Pb by mass. Q) How much of the water (in mL) contains 160mg of P}? (Assume a density of 1.0 mg/mL)
How many molecules of oxygen are produced from the decomposition of 8.75 g of hydrogen peroxide in the following equation Mg + H2O2 --> MgH2 + O2
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