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Chemical A decays over time as a second order reaction. If the concentration after a time of 250 seconds is .0063 M, and the K of the reaction is .0955 / second, what was the initial concentration of chemical A? At what time would the concentration of chemical A reach .0045 M?
Question- A mixture of 1.374g of H2 and 70.31g of Br2 is heated in a 2.00L vessel at 700K. Calculate the equilibrium concentration of H2. Calculate the equilibrium concentration of Br2
The reactant concentration in a zero-order reaction was 9.00×10^-2 M after 100s and 2.50×10^-2 M after 390s . What is the rate constant for this reaction
Question- A researcher suspects that the pressure gauge on a 49.9-L gas cylinder containing nitric oxide is broken. An empty gas cylinder weighs 135 lb. The weight of the partially full cylinder is 164.2 lb. This cylinder is located in a relativel..
Suppose 29.0g of sodium chloride is dissolved in 250.mL of a 0.70M aqueous solution of potassium carbonate. Calculate the final molarity of chloride anion
A sample of air was compressed to a volume of 10.0 L. The temperature was 295.0 K, and the pressure was 8.60 atm. How many moles of gas were in the sample. Enter units.
Find out how many grams of protein, FAT, and carbohydrate are present in a single serving of each item; then calculate the kilocalories that are present in each.
The method of standard additions was used to determine nitrite in a soil ample. an aliquot of 1.00 mL of the sample was mixed with 24.00 mL of a colorimetric reagent, and the nitrite was converted to a colored product with an absorbance of 0.300.
Problem- A galvanic (voltaic) cell consists of an electrode composed of aluminum in a 1.0 M aluminum ion solution and another electrode composed of copper in a 1.0 M copper(I) ion solution, connected by a salt bridge. Calculate the standard potent..
If the concentration of lead iodide [PbI2] in a saturated aqueous solution is 1.5 x 10-3 M, what is the Ksp of PbI2
Which of the following statements are true for pure substances? (i) Pure substances contain only one kind of particles (ii) Pure substances may be compounds or mixtures (iii) Pure substances have the same composition throughout (iv) Pure subs..
The solubility of an unknown salt, M2Z, in a 0.0768 M CaZ solution is 5.6x10-10 mol/L. Calculate the Ksp for M2Z
Which atom has the largest partial positive charge in these bonds. C-H, C-O, C-F, C-Cl C in C-O Cl in C-Cl O in C-O F in C-H C in C-H C in C-Cl C in C-F
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