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What is the percent yield of a reaction in which 210. g phosphorus trichloride reacts with excess water to form 100. g HCl and aqueous phosphorous acid (H3PO3)? 4 significant figures.
A car's catalytic converter combines carbon monoxide, a poisonous gas, with oxygen to form carbon dioxide gas. A balanced equation indicates the mole ratios of reactants and products.
Calculate the amount of heat required to raise the temperature of 1500g of water from 25C to 63C
Liquid butane C4H10 , the fuel used in many disposable lighters, has delta Hfinal=-147.5 kj and a density of 0.579 g/ml . Use Hess's law to calculate the enthalpy of combustion in kJ/mol.
a strong acid is generally used to catalyze the fischer esterification of carboxylic acids. what two steps in the
A 23.7-g sample of ethylene glycol, a car radiator coolant, loses 906 J of heat. What was the initial temperature of the ethylene glycol if the final temperature is 32.5 degrees Celsius (c of ethylene glycol=2.42 J/g*K)
Consider a gas mixture in a 1.50 dm3 flask at 22.0 C for each of the following mixtures, calculate the partial pressure of each gas, the total pressure and the composition of the mixture in mol percent
Use the Gibbs phase rule to find the degrees of freedom for the following systems at equilibrium: a. Liquid water in equilibrium with water vapor. b. Liquid water in equilibrium with humid air.
a 1.80-g sample of a large biomolecule was dissolved in 21.0 g of carbon tetrachloride. the boiling point of this
Which of the following solutions has the highest pH at 25?C?
given that is the central atom draw a lewis structure of in which the formal charges of all atoms are zero.nbspdraw the
a sample of chlorine gas occupies a volume of 946ml at a pressure of 726mmhg. calculate the pressure of the gas in in
In a laboratory class one student group found that 26.6% of A had isomerised after a period of 15.0 minutes when the temperature was maintained at 84.5 °C. What is the half-life in minutes of substance A at that temperature
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