I have having trouble with data table 4 and i would like someone to double check my work on the other tables.

NaHCO3(s) + HC2H3O2(aq) → C2H3O2Na(aq) +H2CO3(aq) H2CO3(aq)→ H2O(l) +CO2(g)

Note: 5 mL of 5% vinegar contains 0.25 mL of HC₂H₃O₂ with a density of 1.0 g/mL which equals 0.25 g HC₂H₃O₂.

Data Table 4

                          Limiting Reactant            Theoretical yield of CO₂(moles)    Theoretical yield of CO₂(g)

Reaction 1        NaHCO₂

Reaction 2        NaHCO₂

Reaction 3       HC₂H₃O₂

Reaction 4        HC₂H₃O₂

_{Data Table 2}

                          Volume of 5%            Mass of HC₂H₃O₂                                            Moles of HC₂H₃O₂

                          Vinegar (mL)

Reaction 1        5.0                                        0.10                                                      0.004

Reaction 2        5.0                                        0.20                                                      0.004

Reaction 3       5.0                                        0.35                                                     0.004

Reaction 4        5.0                                        0.50                                                     0.004

Data Table 1

  Mass of NaHCO₃(g)                        Moles of NaHCO₃

Reaction 1     0.10                                                      0.001

Reaction 2     0.20                                                      0.002

Reaction 3    0.35                                                     0.004

Reaction 4    0.50                                                     0.005

Calculate the molarity of each of the following solutions.

Part A

4.15 mol of LiCl in 2.70 L solution

Part B

26.13 g C6H12O6 in 1.09 L of solution

Part C

31.0 mg NaCl in 124.5 mL of solution

1) how many valence electron are in the electron-dot structure of H2O
2) in a molecule with covalent bonding
3) which of the following polyatomic ions has a 3-ionic charge
4) Fe2(SO4)3 is called
5) the name of the HSO4-ion is
6) a group of covalently bonded atoms that has an overall electrical charge is called an
7) what is the correct formula for iron (iii) sulfide

You Receive a 1.5 mL vial of a 12.5 kDa protein that has a concentration of 1.45 mM. When you test its OD280 in a 1cm cuvette, it is 8.434.

How much total protein, in mg, do you have?

A) 0.027 B) 27.2 C) 27187 D) 15.8 E) 158137

1). A solution contains 0.0490 M Ca²⁺ and 0.0980 M Ag⁺. If solid Na₃PO₄ is added to this mixture, which of the phosphate species would precipitate out of solution first? (which one?)

(a). Ca₃(PO₄)₂

(b). Ag₃PO₄

(c). Na₃PO₄

_2). When the second cation just starts to precipitate, what percentage of the first cation remains in solution?

percentage = ?%

Classify each of the following reactions as one of these four types: • spontaneous at all temperatures • not spontaneous at any temperature • spontaneous below a certain temperature but not above • spontaneous above a certain temperature but not below See Table 17.1 in Tro, Fridgen and Shaw. (a) CO (g) + 3 H2 (g) → CH4 (g) + H2O (g); ∆H = -206.1 kJ; ∆S = -214.6 J/K (b) AgClO3 (s) + CH4 (g) → AgCl (s) + 2 H2O (g) + CO (g); ∆H = -616 kJ; ∆S = 343 J/K (c) CaS (s) + H2S (g) → CaH2 (s) + 2 S (s); ∆H = 317 kJ; ∆S = -157 J/K (d) 2 NH3 (g) → N2 (g) + 3 H2 (g); ∆H = 92.2 kJ; ∆S = 198.8 J/K

What is your opinion about:

1 Releasing the results of a research to the public is considered a good practice. Different views (or criticism) may bring valuable insight to the researchers and perhaps help them to reevaluate their findings.

2 When it comes to publishing research results to the general public, science as a whole should be inclusive in nature. Granted many research projects are funded through public means, the scientist who conduct the research often directly serve the public interest.

200 words each question no plagiarism please

If the density of water is 1g/mL and the density of a 0.16 M HCl solution is 1.023 g/mL, how do I use this information to determine the mass of both water and HCl in one liter of the solution?

***Cancel this question! I figured it out!

Hess's Law:
Calculate ΔH for the neutralization of HCl_(aq) by NaOH_(s). I'M NOT SURE WHAT DATA YOU NEED, SO I COPY AND PASTED ALL OF MY DATA.

A. ΔH_solution of NaOH_(s) Phase Change:
Mass of NaOH: 2.05 g
ΔT for reaction A : 8.0 °C

B. ΔH_solution for neutralization of HCl_(aq) and NaOH_(aq):
Volume of HCl: 0.0500 L
Volume of NaOH: 0.0500 L
Volume total: 0.100 L
Molarity of HCl: 1.95 M
Molarity of NaOH: 1.95 M
ΔT for reaction B: 11.0°C

C. ΔH for Reaction of HCl_(aq) and NaOH_(s):
Volume of HCl: 0.0550 L
Volume of water: 0.0450 L
Volume total: 0.100 L
Molarity of HCl: 1.95 M
Mass of NaOH: 3.44 g
ΔT for reaction C: 17°C

D. ΔH for Solution of KCl_(s) in water:
ΔT for reaction D: -5.0°C
Mass of KCl: 5.02 g
Volume of water: 0.0500 L

In the following reaction what mass of Ba(NO3)2 can be formed by combining 55.0g BaCO3 and 55.0g HNO3? BaCO3+2HNO3=Ba(NO3)2+CO2 +H2O

8. What is the molar fraction of benzene in a solution made by mixing 10 g of benzene (Molecular Weight 78.11) and 10 g of toluene (Molecular Weight 92.14)? Show two significant digits in your answer.

9. Radioactive Iodine-131, with a half-life of eight days, is a common fission product and thus is present in high levels in radioactive fallout. How long will it take for initial radiation intensity to drop 8-fold?

10. In an experiment, a sample was 90% decomposed in 24 min. Approximately how long would this decomposition have taken if the sample had been heated 20°C higher? (Hint: Assume the rate doubles for each 10°C rise in temperature.)

11. Find which kind of catalyst is necessary to facilitate the reaction between molecular nitrogen and molecular hydrogen to make ammonia (several words description)

Acetylsalicylic acid, C₉H₇O₂COOH, has a pK_a = 3.480. A solution was prepared by dissolving 6.20 g of acetylsalicylic acid in 1.000 L of solution.   mw = 180.16 g/mol.

A. Calculate the pH using the quadratic and the approximate approaches.

Approximate method yields pH = 2.47

Quadratic methods yields     pH = 2.49

B   Calculate the percent error introduced in the hydrogen ion concentration if the approximate solution was chosen

% error in terms of hydrogen ion concentration is 4.98%

I know the answer for B, I just don't know how to do it :(

How many moles of Al2O3 is produced from 0.32 mol Al and 0.26 mole O2? How many moles of Al2O3 are formed from the reaction of 6.38 grams of O2 and 9.15 grams of Al? How many grams of Al2O3 are formed from the reaction of 8.32x10^20 molecules of O2 and 4.26x10^21 molecules of Al? use 4Al+3O2=2Al2O3 to help.

1 a. A buffer solution is prepared by placing 5.86 grams of sodium nitrite and 32.6 mL of a 4.90 M nitrous acid solution into a 500.0 mL volumetric flask and diluting to the calibration mark. If 12.47 mL of a 1.43 M solution of potassium hydroxide is added to the buffer, what is the final pH? The K_a for nitrous acid = 4.6 X 10^-4.

1 b. A 0.892 liter buffer solution is prepared so that it is 0.430 M in benzoic acid (C₆H₅COOH) and 0.490 M in sodium benzoate (C₆H₅COONa). If you add 15.80 mL of a 2.53 M solution of nitric acid to this buffer solution, what is the final pH? The K_a for benzoic acid = 6.5 X 10^-5.