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In the first part of this lab, you prepared a NaBr solution that is approximately 0.2 M. Considering that molarity is defined as moles of NaBr per liter of solution, give possible errors that are present in the procedures that will cause your actual molarity to be different from that calculated. (Note: Because this lab involved qualitative analysis, the actual molarity of your solution did not need to be known accurately.)
To find the % by mass of a compound in a given sample - Determine the percent by mass of calcium carbonate in the sample. State any assumptions.
when formic acid is heated it decomposes to hydrogen and carbon dioxide in a first-order decayhcoohg rarrco2g h2 gthe
Question- A gaseous system undergoes a change in temperature and volume. What is the entropy change for a particle in this system if the final number of microstates is 0.448 times that of the initial number of microstates
A 100 mL sample of .20 M HF is titrated with .10 M KOH. Determine the pH of the solution before the addition of any KOH. The Ka of HF is 3.5 * 10^-4
Phosphate buffer has 3 ionizable groups, with pKa's of 2.15, 7.2, and 12.45. A 1.20 M solution of this buffer (250 mL) is found to have a pH of 6.0. A biochemist adds 30 mL of 1.0 M NaOH to this buffer. What is the resultant pH?
Gold chloride,AuCl, has a Ksp of 2.0x10^-13. How many grams of gold are found in 500. ml of a saturated aqueous solution of AuCl
Using ethanol as the source if all carbon atoms, outline multistep synthesis
Na3P + 3H2O ---> PH3 + 3NaOH. What is the theoretical yield of PH3 when 150 grams of Na3P is mixed with 250 grams of H2O? If the actual yield is 30 grams, what is the % yield?
How many different 5.00 d states does hydrogen have. Make a list showing all of them. What are the possible s. in increasing order
At what point is the temperature in degrees farenheit exactly twice in degrees celsius
The Ksp of lead(II) hydroxide, Pb(OH)2, is 1.43 × 10-20. Calculate the molar solubility of this compound.
describe the main components of the liquid chromatography-mass spec and how they are used in sample identification.
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