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Question: Determine the percent composition by mass of a 100 g K2SO4 solution containing 20-g solute. What is the mole percent composition of the solute, assume that solution consists of 100 g water and 20 g K2SO4?
The enzyme catalase catalyzes the decomposition of hydrogen peroxide. The following data are obtained regarding the rate of reaction as a function of substrate concentration.
A gas mixture is made by combining 7.2g each of Ar, Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 92.04L. What is the molar mass of the unknown gas in g/mol, and identify the unknown gas
Calculate an approximate delta_h in kilojoules for the industrial synthesis of ethyl alcohol from ethylene: C2H4(g) + H2O(g) -> C2H5OH
A 134-mL bubble of hot gases at 217C and 1.79 atm escapes from an active volcano. What is the temperature, in C, of the gas in the bubble outside the volcano if the new bubble is 164mL and the pressure is 0.759 atm?
What mass of Li2S is needed to prepare 300. mL of a solution having a litium ion concentration of 0.050 M
What volume of 1 M HCl do you have to add to change the pH of the solution to 6? Assume that the change in volume from adding HCl is negligible. Recall that pH = pKa + log([A-]/[HA]. I cannot, for the life of me, figure this out.
Describe how would your result be affected if you mistook a negative Starch-iodide test and stopped adding the NaOCl solution too early?
portion of the stock solution and dilute it to a total volume of 0.550L what will be the concentration of the final solution?
What ions and/or molecules are present in relatively large proportions in a solution of a soluble ionic compound NaCl (aq)
What would be the pH of a 3x10-4 M solution of acetic acid (CH3COOH) given its acid dissociation constant Ka = 10-4.75? What are the concentrations of CH3COOH and CH3COO-
Compare HASAW Act with Occupational health and safety regulations of Sultanate of Oman. and give an outline of what would be needed to set up a suitable safety management system to control the hazards in a chemical process industry
The addition of HBr to optically active (R)-4-bromocyclohexene gives four diastereomeric dibromocyclehexane products that were separated and characterized.
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