A 27.5 L sample of oxygen gas is at 25°C and 1.05 atm. If the gas is cooled to –
40.°C while the pressure is increased to 2.00 atm, calculate the new volume of the
gas.
Can u please show with dymentional analysis?
In: Chemistry
Suppose that you have 175mL of a buffer that is .150M in both formic acid and its conjugate base.
a) what is the buffer range of the buffer solution?
b) what is the buffer capacity?
In: Chemistry
An electrolysis cell is operated for 3000 s using a current of 1.50 A. From which 1.0 M solution will the greatest mass of metal be deposited? Answer is A please explain
(A) TlNO3
(C) ZnCl2
(B) Pb(NO3)2
(D) In(NO3)3
In: Chemistry
Which of the following reactions in the stratosphere cause an increase in temperature there?
Check all that apply.
Check all that apply.
| O2(g)+hν⟶2O(g) | |
| O(g)+O2(g)⟶O3∗(g) | |
| O(g)+N2(g)⟶NO(g)+N(g) | |
| O3∗ (g)+M(g)⟶O3(g)+M∗(g) |
In: Chemistry
1)To determine the oxidation state of a monoatomic ion, first determine the charge of the ion. The oxidation state will be the same as the charge. For example, I forms the monoatomic ion I−; therefore, the oxidation state of the monoatomic ion for I is −1.
What is the oxidation number of the monoatomic ions of the following elements?
Drag each item to the appropriate bin.
Ca, Cs, F, Rb, Mg, Po, S, B, K, N, I
[Bins] +3, +2, +1, -1, -2, -3
2)For the following reaction, calculate ΔH∘rxn, ΔS∘rxn, and ΔG∘rxn at 25 ∘C.
NH4Cl(s)→HCl(g)+NH3(g)
3) For each reaction, identify the substance being oxidized and the substance being reduced.
Ni2+(aq)+Mg(s)→Mg2+(aq)+Ni(s)
4)In acidic solution, the nitrate ion can be used to react with a number of metal ions. One such reaction is
NO3−(aq)+Sn2+(aq)→NO2(aq)+Sn4+(aq)
Since this reaction takes place in acidic solution, H2O(l) and H+(aq) will be involved in the reaction. Places for these species are indicated by the blanks in the following restatement of the equation:
NO3−(aq)+Sn2+(aq)+ −−−→NO2(aq)+Sn4+(aq)+
What are the coefficients of the reactants and products in the balanced equation above? Remember to include H2O(l) and H+(aq) in the appropriate blanks. Your answer should have six terms.
Enter the equation coefficients in order separated by commas (e.g., 2,2,1,4,4,3). Include coefficients of 1, as required, for grading purposes.
5) Classify each half-reaction occurring in acidic aqueous solution as an oxidation or a reduction and balance the half-reaction.
S(s)→H2S(g)
S2O8^2−(aq)→2SO4^2−(aq)
Cr2O7^2−(aq)→Cr3+(aq)
NO(g)→NO3−(aq)
6) Balance each redox reaction occurring in basic aqueous solution.
Express your answer as a chemical equation. Identify all of the phases in your answer.
H2O2(aq)+ClO2(aq)→ClO−2(aq)+O2(g)
Al(s)+MnO−4(aq)→MnO2(s)+Al(OH)−4(aq)
Cl2(g)→Cl−(aq)+ClO−(aq)
7) Classify each reaction as spontaneous or nonspontaneous.
Cr(s) + 3Ag^+(aq)>Cr^3+(aq)+3Ag(s)
Cu(s)+Ca^2+(aq)>Cu^2+(aq) + Ca(s)
Ca(s)+Ni^2+(aq)>Ca^2+(aq)+Ni(s)
Mg(s)+2K^+(aq)>Mg^2+(aq)+2K(s)
Cu(s)2Ag^+(aq)>Cu^2+(aq)+2Ag(2)
Sn(s)+Ni^2+(aq)>Sn^2+(aq)+Ni(s)
In: Chemistry
For a 0.0299 M aqueous solution of aniline, C6H5NH2 (Kb = 7.4E-10), determine the following. Kw = 1.0E-14.
What are the major and minor species present? Include phase.
What is the major species (other than water)?
What is the minor species (other than H3O+ and OH-)?
What is the concentration of the minor species in the solution? (M)
What is the concentration of the major species in the solution? (M)
What is the concentration of H3O+ in the solution? (M)
What is the concentration of OH- in the solution? (M)
Find the pH.
In: Chemistry
What is the final temperature when 76.8 g of water at 73.1°C is mixed with 21.5 g of water at 29.5°C? (The specific heat of water is 4.184 J/g·°C.)
In: Chemistry
Now consider the reaction when 45.0 g NaOH have been added. What amount of NaOH is this, and what amount of FeCl3 can be consumed by it?
___________mol NaOH available
__________mol FeCl3 that can react
In: Chemistry
Prelab question for Determination of the Universal Gas Constant, R:
How does collecting the oxygen over water affect the volume of gas collected? Why does this happen?
Please be specific and answer this question directly. I've already asked once and received a general answer not specifically regarding how this affects the Volume and Why it happens.
In: Chemistry
Write balanced molecular, ionic, and net ionic equations with states of matter.
1.) sodium carbonate + ammonium iodide
2.) iron (iii) chloride + ammonium iodide
3.) iron (iii) chloride + copper (ii) sulfate
4.) ammonium iodide + sodium hydroxide
5.) ammonium iodide + copper (ii) sulfate
In: Chemistry
IN MICHAELIS MENTEN GRAPH, HOW WOULD YOU INCREASE VELOCITY BEYOND Vmax?
In: Chemistry
Titrate 40.0 mL of 0.0350 M benzoic acid (C6H5COOH, Ka = 6.3 ×
10–5) with 0.0700 M NaOH Calculate the pH in the solution after
addition of 25.0 mL of 0.0700 M NaOH.
a) 2.269
b) 8.284
c) 9.845
d) 11.731
e) 5.628
In: Chemistry
Concentration of NaOH solution= 0.02803 M
Concentration of Crystal Violet dye solution=0.001 M
Room Temperature =25 degree celcius
Absorbance from the device- spectrovis(spectrophotometer)
The data in the trials are the absorbance.
-Its not Organic chemistry. Its an experiment about the crystal violet dye. Mainly they want to know how we get the rate law using these numbers. It's asking for the rate law through these 2 trails and its asking to use some numbers to show how its solved . I also provided the procedure of the experiment.
1. Make sure the SpectroVis is plugged in to the LabQuest and the Labquest is plugged into a power outlet. 2. Turn on the Vernier by pressing the power button on the top 3. If it ask to Auto Recover, press no. 4. Tap Mode at the top right 5. Change the mode from Full Spectrum to Time Based. 6. Change the Interval to 30 seconds per sample 7. Make the Duration 450 seconds. 8. Tap OK 9. Tap Red USB: Abs 10. Tap Change Wavelength to 540 nm 11. Press Play in the bottom left, and allow Warm up for 90 seconds 12. Place Blank cuvette (NaOH) in SpectroVis. Ensure clear side is facing the arrow 13. Tap Finish Calibration 14. Add Crystal violet dye and immediately replace cuvette in SpectroVis and press ok. 15. Allow running for 450 seconds. 16. Press the file cabinet to ready a second trial 17. Repeat steps 11 and 12. 18. Get a fresh aliquot of NaOH of the second concentration. 19. Do two more trials with a second concentration of NaOH.
Time
Time: Trial 1 Trial 2
0 0.335 0.435
90 0.279 0.363
120 0.188 0.248
150 0.158 0.206
180 0.095 0.135
210 0.075 0.106
240 0.055 0.083
270 0.037 0.063
300 0.023 0.046
330 0.013 0.030
360 0.000 0.018
390 -0.007 0.006
420 -0.014 -0.002
450 -0.020 -0.009
The following calculations must be handwritten in your notebook. – Conversion of %Transmittance to Absorbance ■ Only one handwritten sample is necessary ■ However, all of your %Transmittance values must be converted to Absorbance in your Data Table
–The steps you took to determine the order with respect to the Crystal Violet Dye (X in the example)
– The steps you took to determine the order with respect to the NaOH (Y in the example)
– The steps you took to determine k – The overall, Modified Rate Law ■ With your values for X, Y, and k inserted into the equation
– Solve the Rate Law ■ Insert in all values necessary Result
Answer in steps please and in detail in order for me to understand it. I will appreciate your help thank you.
In: Chemistry
Discuss the use of Lanthanide shift reagents (LSR) in NMR spectroscopy, both how it works and why it is important.
In: Chemistry
What is the expected alkyl bromide product from reaction: 3-methyl-1-butanol with HBr
In: Chemistry