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A 1.994 g sample of ethanol, CH3CH2OH, is combusted in a bomb calorimeter. The temperature of the calorimeter increases by 10.91 K. If the heat capacity of the bomb is 615.5 J/K and it contains 1.150 kg of water, what is the enthalpy change per mole of ethanol combusted? The specific heat capacity of water is 4.184 J/g×K and the molar mass of ethanol is 46.07 g/mol.
A 13 mL sample of a solution of Pb(ClO3)2 was diluted with water to 17 mL. A 15 mL sample of the dilute solution was found to contain 0.027 moles of Pb2+. What was the concentration of Pb(ClO3)2 in the original undiluted solution?
Describe how you would construct your target electrochemical cell, including the identities and concentrations of all chemical species, as well as a diagram of the setup.
Calculate Ka and Original Concentration of Weak Base, You have a solution of a weak base, the pH of which is 10.7532. If 10.000 mL of this solution will neutralize 6.655 mL of 0.07667
The specific heat of liquid bromine is 0.226 J/g-K. How much heat (J) is required to raise the temperature of 10.0 mL of bromine from 25.00C to 27.30C? The density of liquid bromine: 3.12 g/mL
A solution was made by taking 1.250g of KMnO4 and dissolving it in enough water to make 1.000 liter of solution. This solution was used to titrate H2C2O4·2H2O, a very pure substance. In acidic media, the reaction is.
If a second experiment is done with half as much H2O2 as the experiment in question 1, and the solution turns blue in 180 seconds, what is the order of the reaction with respect to H2O2?
What is the value of Keq for the reaction 4 HCl(g) + O2(g) reverse reaction arrow 2 Cl2(g) + 2 H2O(g)?
Determine the concentration of the sulphuric acid (H2SO4) solution If It takes 58 mL of 0.124 M potassium hydroxide(KOH) to neutralize 41.5 mL of sulphuric acid( H2SO4) solution.? Express your answers in units of moles/liter
a gas has a volume of 25 ml when its pressure .056 atm what will the volume of the gas be at the pressure of 1.00 ?
A buffer solution of pH of 9.25 contains P mol of a weak base and Q mol of a salt of its conjugate acid. When 120 cm3 of a 0.0140 mol.dm-3 solution of hydrochloric acid was added to this buffer solution
What happens to the solubility of an ionic compound as ionic strength of the solution increases up to ~0.5 M)? Why is there a correlation between the solubility of an ionic compound and the ionic strength of the solution?
what is the volume change when 2 kg of water at 6.8 MPa and 93 Celsius expands to 1.6 bar
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