Find the concentration of Fe+3 and NCS- in the following vials:
Vial # .002 M Fe(NO3)3 .002 M KSCN Distiled Water
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1 3 mL 1 mL 6 mL
2 3 mL 2 mL 5 mL
3 3 mL 3 mL 4 mL
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Find [H+] in 0.40 M NH4NO3 at 25 degrees Celsius given that Kb = 1.8 x 10-5 for NH3 (aq).
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How/why does the chemical species F- (fluoride) at concentrations 3.22 ppm cause fish death? Explain your answer in a typed paragraph.
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what is the concentration of H+ ions after adding 5.41 mL of of 0.816 M NaOH to 65.7 mL of 1.97 M HNO3?
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Part B
Indicate the number of unpaired electrons for following: [noble gas]ns2np5
Express your answer as an integer.
Part C
Identify the group of elements that corresponds to the following generalized electron configuration: [noble gas]ns2(n?1)d2
Incorrect; Try Again; 5 attempts remaining
Part D
Indicate the number of unpaired electrons for following: [noble gas]ns2(n?1)d2
Express your answer as an integer.
Part E
Identify the group of elements that corresponds to the following generalized electron configuration: [noble gas]ns2(n?1)d10np1
Incorrect; Try Again; 5 attempts remaining
Part F
Indicate the number of unpaired electrons for following: [noble gas]ns2(n?1)d10np1
Express your answer as an integer.
Part G
Identify the elements that correspond to the following generalized electron configuration: [noble gas]ns2(n?2)f6
Express your answer as the element symbol. If there is more than one answer, separate them by a comma.
Part H
Indicate the number of unpaired electrons for following: [noble gas]ns2(n?2)f6
Express your answer as an integer
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chemistry
please I need report for lap experiment :
1- testing salt for cations
2- testing salt for anions
3- titration
hint:
please send copy to my email
[email protected]
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Consider the titration of a 20.0mL sample of 0.105M HC2H3O2 with 0.125M NaOH. Determine each of the following. a) Initial pH b) the volume of added base required to reach the equivelence point c) the pH at 5.0 mL of added base d) the pH at one-half of the equivelence point e) the pH at the equivelence point f) ph after adding 5.0ml of base beyond the equivalence point
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Add up the total grams of organic material extracted via 3 extractions and compare it to the grams extracted with only 1 extraction. What conclusions can you make about the use of multiple extractions?
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The ΔGo of a reaction: (more than one answer may be correct)
| A) | will change if the temperature of the reaction is changed. |
| B) | can predict whether a reaction will be thermodynamically favorable under standard conditions. |
| C) | will change if the concentration of reactants and products are changed. |
| D) | can be used to help calculate whether a reaction is thermodynamically favorable under defined non-standard conditions. |
|
E) is not related to the equilibrium constant. |
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what does the enzyme phosphatase do in regards to nucleic acid biochemistry
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3. How many mL of 4.25 M HI will be needed to Neutralize 187 mL of 4.57 M Mg(OH)2
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Describe the following 3 types of chromatography: thin-layer chromatography, flash column chromatography, and gas chromatography. For each type describe the scale (how much compound can be used), the utility and describe the 2 phases that correspond with that type of chromatography.
2. what is necessary for separation using chromatography
3. what is normal phase and reverse phase chromatography
if you could link me a video so i could learn I will add points.
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