What kind of kinetics is observed in an enzymatic reaction, under conditions where the substrate concentration is low compared to the Km?

A.How many moles of silver carbonate can be made from 50.0 ml of 0.100 M AgNO3 and 50.0 ml of 0.100 M Na2CO3 ? B. What is the molarity of the carbonate ions left over? (First find how many moles of carbonate are left over.) C. What is the molarity of the sodium ions in the final solution?.

1) One method of producing drinkable water is to force seawater through a membrane that does not allow the salt to pass through. Such a process is called reverse osmosis (RO) and the membrane a reverse osmosis membrane. A large reverse osmosis facility continuously filters 2300 L of seawater per hour. The seawater contains sodium chloride (NaCl) at a concentration of 1.4 M. Two streams emerge from the RO facility: (1) a “brine” stream with a sodium chloride concentration of 5.6 M and flow rate of 560 L/hr and (2) a drinking water stream. The densities of the three streams can be considered to be the same. What is the sodium chloride concentration in the drinking water?

Explain why there is a steep slope in a section of the titration curve and explain how it can be used in calculations ?

how do you configure the percent composition of a simple and fractional distillation of cyclohexane and toluene simple 69C fractional 68C

What is the purpose or objective of the synthesis of CoII(salen) complex?

A certain ionic compound has a ΔH soln = -65.4 kJ/mol. Which of the following conclusions is correct? A certain ionic compound has a ΔH soln = -65.4 kJ/mol. Which of the following conclusions is correct?

ΔH solute ≈ 0,

ΔH hydration < 0

ΔH solute < ΔH hydration

ΔH solute ≈ ΔH hydration

ΔH solute > ΔH hydration

A certain substance has a heat of vaporization of 62.41 kJ/mol. At what Kelvin temperature will the vapor pressure be 5.00 times higher than it was at 317 K?

The osmotic pressure of a solution containing 1.44 g of an unknown compound dissolved in 175.0 mL of solution at 25 ∘C is 1.93 atm . The combustion of 32.88 g of the unknown compound produced 55.60 gCO2 and 22.76 gH2O . What is the molecular formula of the compound (which contains only carbon, hydrogen, and oxygen)?

Gas Chromatography- Mass Spectrometry

If the chromatographic elution peaks in the sample are far apart and analysis takes a relatively lon time, should you increase or decrease the column temperature program to improve analysis time? Explain your reasoning.

A 1.00 L sample of a gas at 25.0

The osmotic pressure of a solution containing 1.44 g of an unknown compound dissolved in 175.0 mL of solution at 25 ∘C is 1.93 atm. The combustion of 32.88 g of the unknown compound produced 55.60 gCO2 and 22.76 gH2O. What is the molecular formula of the compound (which contains only carbon, hydrogen, and oxygen)? Express your answer as a chemical formula.

The ionic radii of Ma+ and Xa- of MaXa ionic compounds are 0.102 nm and 0.181 nm, respectively. The ionic radii of Mb+ and Xb+ of MbXb ionic compounds are 0.061 nm and 0.175 nm, respectively. A student claimed that MaXa ionic compounds have a tetrahedral configuration with coordination number of 4 and MbXb ionic compounds have an octahedral configuration with coordination number of 6. Is this feasible? If so, state why it is feasible. If not, provide your reason why it is not possible.

In an attempt to create a biological battery for energy storage, you examine the possibility of incorporating a rare enzyme that facilitates the phosphorylation of 3-phosphoglycerate (3PG) in the presence of H+ to form 1,3 bisphosphoglycerate (1,3-BPG). The delta G for this enzymatically driven process is +59.6 kj/mol.

A.) Draw the reaction scheme for 3PG to (1,3-BPG).

B.) is this a spontaneous or nonspontaneous reaction?

C.) What is the Keq under standard biological conditions, based on the delta G value above?

D.) What effect should raising the pH habe on the free energy of the reaction?

Calibration Method 1: Regular Calibration

Starting with solid CaCO₃, describe how you will prepare Ca²⁺ standards in 0.1 M nitric acid in the concentration range 5-60 ppm (MW CaCO₃ = 100.08 and MW Ca = 40.08).

Remember you do not want to weigh out very small amounts because small fluctuations in the balance can create large errors. You should not weigh out an amount of CaCO₃ less than 0.1 g. Therefore, you may need to prepare a stock solution with a higher concentration than the desired range (such as 150 ppm) and then dilute the stock solution to make standards in the appropriate range.

Include the mass of the CaCO₃, the steps for preparing the solution, and the types of pipets and volumetric glassware you will use.