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In the laboratory, a student adds 41.9 mL of water to 25.8 mL of a 0.877 M perchloric acid solution. What is the concentration of the diluted solution
105 cm3 of 2MSulphuric acid is required to neutralise 420 cm3 of potassium hydroxide. What is the concentration of potassium hydroxide?
Octane has a density of 0.692 g/ml at 20 degrees celsius . How many grams of O2 are required to burn 16.0 gallons of C8H18 ?
What is the activation energy for this reaction? a) 112 kJ/mol. b) 56 kJ/mol. c) 28 kJ/mol. d) 336 kJ/mol. e) 448 kJ/mol.
Properties of subatomic particles - Fill in the missing relative masses and relative charges for each of the subatomic particles
What is the value of Delta S when 2.7g of CH4 is compressed from 29.0 L to 18.0 L at a constant temperature of 100 C?
Describe the titration curve for the titration of a weak base with a strong acid. Indicate the chemical reaction, the points that correspond to the equivalence point, the pH = pKa and the region with maximum buffering.
Calculate the empirical and molecular formulae of A and B. Deduce the structural formulae of A and B. State the type isoerism exhibited by A and B.
cannot be dehydrated to an alkene without rearrangement. What is the chief product of dehydration?
At a certain temperature and pressure 2.8 L of N2 reacts with 4.2 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure, will be produced
Draw electron-dot formula and determine the shape for each of the following: a) NH4^+; b) O2^2-; c) COCl2 (C is the central atom); d) BCl3.
Calculate the mean and standard deviation of w/v percentage of acetic acid and the 95% confidence interval for the mean. Calcium in a mineral was analyzed five times by each of two methods
How many grams of Ag3PO4 can be produced from the reaction of 2.50 L of a 0.200M AgNO3 with an excess of 0.750 K3PO4 solution according to the following equation?
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