Balance the following equation by the method of oxidation-reduction showing all electron tranfers. Please show work.

___ H₂C₂O₄ + ____ KMnO₄ ---> ____ CO₂ + ____ Mn₂O₃ + ____ H₂O

Identify (a) the atom oxidized, (b) the atom reduced, (c) the reducing agent, (d) the oxidation half reaction, and (e) the reduction half reaction.

1. The isoelectric point of casein is 4.6. Milk has a pH of 6.6. What does prolein look like in milk, (overall negative -, overalll positive +, or neutral with both – and + charges)?

1) If you had not dried the solid, would the calculated percent yield have been higher, lower, or unchanged? Explain

2)Boron trichloride is prepared from the following reaction. 2B2O3 + 6Cl2 + 3C --> 4BCl3 + 3CO2 If 8.254g of B2O3 is mixed with 4.446g of Cl2 and 4.115g of C then answer the following questions.   

2a) What is the theoretical yield of boron trichloride in grams?

2b) How much of each of the excess reagents with remain once the reaction is complete? (report in grams)

3) If the yield of the reaction in question 2 is known to be only 73.42%, how much of each of the three reagents would you need to obtain 10.000g of boron trichloride?

I am so confused?? I included my data, the procedure and what we need to calculate. Dont know where to begin. Thank you!

Average mass of Pepto bismol tablets - 1.021

Mass in weighing boat = 10.080 g

Mass of emptied weighing boat = .003

subtract the two masses = 10.077

Measured mass of 2nd filter paper 0.116G

Watch glass 54.756 g

Obtain 10 pepto bismol tablets. Find the average mass of the 10 tablets and calculate the average mass/tablet.   Average mass of pepto bismol tablet = 1.021

Grind the tablets

Pour the contents into a weighing boat and find it mass.   10.080 g

Pour the contents of the weighing boat in a 250 ml beaker and find the mass of the weighing boat after it is emptied. Subtract the two masses for the mass of the ground tablets in the beaker. Mass of emptied weighing boat = .003          subtract the two masses = 10.077

Measure 100 ml of 2 M HCI into a graduated cylinder.

Add 20 ml of 2 M HCI to the powder and mix with a glass rod until it stops foaming.

Using a Buchner funnel, filter paper and a clean arm flash that has been rinsed with purified water, filter the the solution.

if the filtrate is cloudy, pour it back into the beaker and filter it through the same piece of filter paper again.

using your squeeze bottle, rinse the beaker with small amounts of purified water and pour into the funnel. This rinses the solids in the process.

Transfer the solution to 250mL to a volumetric flask.

Use a 25ml volumetric pipette to measure 50 ml of your solution into a beaker.

Measure 60 mL of 0.2 M Na3PO3 in a graduated cylinder and add to the beaker.

using a buchner funnel, filter paper and side arm flask, filter the solution and retain the solid. Filter this solution until clear.

Once your BiPO4 has been filtered, place the filter paper onto a pre weighed watch glass and place it where instructed to dry until next week.

The following week, obtain the mass of the BiPo4 precipitate.

1 Calculate the mass of pepto bismol tablets that were placed into your beaker in step 4 week 1

2 calculate the mass of dry BiP)4 precipitate by subtracting the watch glass and filter paper mass.

from the mass of precipitate, calculate moles of BiPO4 that were formed.

3 Using the moles found in (3) and the knowledge that each sample used 50 ml of solution find the concentration in moles/L of Bi3+ in solution before you added Na3PO4.

4 With the concentration calculated in (4) calculate the total number of moles of Bi in the 250 ml volumetric flask.

5 Knowing that each Bismuth subsalicylate molecule contains 1 bismuth atom (a 1:1 ratio), calculate the number of moles of bismuth subsalicylate you added to your original beaker and convert this to grams.

6 Divide grams of bismuth subsalicylate (6) by grams of pepto bismol used (1). This will give you an answer in units of g Bi-SS/g PB tablet.

7 Knowing your average mass per tablet, find the mass of Bi-SS tablet. Hint you have g Bi-SS g PB and you have g PB tablet.

A gaseous compound containing hydrogen and carbon is decomposed and found to contain 82.66 % carbon and 17.34 % hydrogen by mass. The mass of 158 mL of the gas, measured at 556 mmHg and 25 ∘C, is found to be 0.275 g. What is the molecular formula of the compound? Express your answer as a chemical formula.

Enzymes:

what is a transition state complex?

Tobacco smoke, containing at least 50 known carcinogens, is often considered the most harmful and widespread contaminant of indoor air. Many airports have a designated smoking area to prevent these contaminants from spreading to the rest of the airport. Consider one such smoking area with a volume of 15 m×15 m×4 m that has 35 persons smoking two cigarettes every hour. One of the gases coming out of a cigarette is formaldehyde and each cigarette may be assumed to emit 1.35 mg of formaldehyde. Conversion of formaldehyde to carbon dioxide can be assumed to be first order and the rate of reaction is 0.40 per hour. Outside (fresh) air enters the enclosed space at the rate of 800 m3 per hour. Assume the smoke becomes completely mixed with air and this smoke-mixed air leaves the enclosed space at the same rate that the fresh air enters. Initially the formaldehyde value is zero. (a) What is the concentration of formaldehyde in the room air at steady state? (b) If the threshold for eye irritation due to formaldehyde is 0.05 ppm (parts per million), what minimum flow rate of fresh air needs to be maintained for the enclosed space? [At the assumed temperature of 25°C and pressure of 1 atm for the enclosed space, convert the formaldehyde concentration to ppm using the formula ppm =mg/m3×24.45/M, where M is 30, the molecular weight of formaldehyde]

Balance the following equation in basic conditions. Phases are optional.

CoCl2+Na2O2 = Co(OH)3+Cl- +Na+

A buffer solution is prepared from equal volumes of 0.200 M acetic acid and 0.600 M sodium acetate use 1.80 *10^-5 as Ka for acetic acid.

a.) what is the pH of the solution

b.) Is the solution acidic or basic

c.) What is the pH of a solution that results when 3.00ml of 0.034 M HCl is added to 0.200L of the original buffer

Determine the amount of heat (in kJ) given off when 1.38 X 10⁴ g of NO₂ is produced according to the following equation: 2 NO(g) + O₂ goes to 2NO₂ (g) Delta H = -114.6 kJ/mol Enter your answer in scientific notation

At 25 ∘C phosphoric acid, H3PO4, has the following equilibrium constants:

H3PO4(aq)+H2O(l)H2PO4−(aq)+H2O(l)HPO42−(aq)+H2O(l)⇌⇌⇌H3O+(aq)+H2PO−4(aq)H3O+(aq)+HPO42−(aq)H3O+(aq)+PO43−(aq

What is the pH of a solution of 0.300 M K2HPO4, potassium hydrogen phosphate? Express your answer numerically to the hundredths place.

What is the pH of a solution of 0.700 M KH2PO4, potassium dihydrogen phosphate?

Express your answer numerically to the hundredths place.

At 1atm, how much energy is required to heat 47.0 g of H2O(s) at -16.0 degrees celcius to H2O (g) at 153.0 degrees celcius?