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?

Consider how each of the situations described below would affect the experimental value determined for the molecular weight of an unknown solid acid. explain why the experimental molecular weight would be too large, too small, or unaffected because of the situation described.

A) During the titration the student use deionized water to rinse a drop of NaOH into their flask.

b) after standardizing the NaOH the student allows the container of NaOH to stand open in the air. this allows carbon dioxide from the air to react with the water in the solution to make a small amount of carbonic acid.

C) before beginning the titration of the unknown solid acid, the student incorrectly records the initial buret reading as 50.00 ml instead of 0.00ml . He correctly records the final buret reading as 32.81 ml. He then calculates the volume of NaOH used as 50.00 ml -- 32.81ml.

A 110.0 −mL sample of a solution that is 3.0×10−3 M in AgNO3 is mixed with a 220.0 −mL sample of a solution that is 0.14 M in NaCN. After the solution reaches equilibrium, what concentration of Ag+(aq) remains?

a.) You have performed a series of experiments determining the K_i values for three competitive inhibitors. The following table lists the results:

i) Which inhibitor binds with higher affinity to the free enzyme? Explain.

ii) If the same concentration of inhibitor were used in each experiment, which inhibitor would give the smallest value of K_M? Explain your answer.

b.) You want to load 10ug of protein in 15uL into one of the 10% polyacrylamide gel wells. The protein needs to be in 1X buffer and in a total volume of 0.250ml. You are given a 5.58mg/ml protein solution, a 20X sample buffer, and distilled water. How much of each would you mix together to make the required volume? Show all steps please.

What are the consequences of deficiencies of the acyl-CoA dehydrogenase enzyme? Discuss the normal role of the enzyme, and how reduced activity impacts fatty acid metabolism. What metabolites used for fuel do you expect to be higher in the blood? What metabolites used for fuel do you expect to be much lower in the blood? How do the excess or lack of these metabolites influence the function of the organs that deal with these metabolites?

True or False????

1) The Cp,m of He gas at 10K and 1 atm is larger than 5R/2.

2) ΔH does not depend on temperature.

3) Whether the equilibrium constant of an ideal-gas reaction increases or decreases, as T increases, is determined by the sign of ΔH.

4) Since the concentrations of reactants decreases with time, the rate, r, of a reaction always decreases as time increases.

Need help asap, please write a little explanation/reasoning as to why it is T/or F. Thank you.

A beaker with 1.50