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Problem- The half life for the first order decomposition of N2O5 is 20.5 x 10^4 s. How long will it take for a sample of N205 to decompose to 80%, 50%, and 20% of its initial value?
I am not able to determine the correct answer for the above question please helps me to get the correct answer
Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C6H5CO2H) and 0.15 M sodium benzoate (C6H5COONa). [Ka = 6.5 ? 10-5 for benzoic acid]
You are given the following boiling point data: Which of the liquids would you expect to have the highest vapor pressure at room temperature
Which of the two ionic compounds, NaCl or CaCl2 has the larger lattice energy. Why
A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At0?C, the volume of the gas is 248 mL. To what temperature must the gas be heated to occupy a volume of 479mL.
Hydrogen (H2(g)), 100.L at 380.mm Hg reacts at 150°C in a 110.L container with oxygen O2(g) (10.0L at 3.00 atm) to give water (H2O(g)). (a) How many moles of H2O(g) much water is formed? and (b) What are the total pressure and the partial pressure..
Predict that it was dissolved in HCl then mixed into the diethyl ether because diethyl ether is a base and since the benzoate contains an amine group they would remain unreactive with one another.
A 40.0 mg sample of a protein is dissolved in water to make 25.0 mL of solution. The osmotic pressure of the solution is 0.56 torr at 25°C. What is the molar mass of the protein?
A buffer is made from benzoic acid and sodium benzoate. How many grams of the acid would you have to mix with 14.4 g of the sodium salt to have a liter of a solution with a pH of 3.88. The Ka of benzoic acid (C4H5CO2H) is 6.3 x 10-5.
a semiconductor laser in a cd player has an output wavelength of 780 nm and a power level of 0.10 mw. how many photons
A sample of 54.7 g of HCl gas is dissolved to make 1L of solution. What is the molarity of the solution?
In basic solution CrO42- oxidizes HSnO2- to HSnO3- and is reduced to CrO2-. Write the balanced net ionic equation for this reaction. How many OH- are there in the balanced equation
Suppose a reaction has a standard Gibbs-free energy of -15.1 kJ/mol, calculate the relative ratio of product to reactant.
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