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How many liters of cyclohexane require to be burned to free as much energy as burning 10.0 Ib of pine logs? The density of cyclohexane is 0.7785g/mL, and its DeltaH comb = -46.6kj/g.
A mixture of calcium carbonate and calcium oxide that weighed 1.720g was heated until all the calcium carbonate was decomposed to calcium oxide .after heating the sample weighed 1.533g. Compute the
Fill in the missing relative masses and relative charges for each of the subatomic particles.
By solving this problem student understand about isotopic abundance and how to calculate atomic weight (average atomic mass) of an element.
A 1.50g sample of a mixture containing only Cu2O and CuO was treated with hydrogen to produce 1.2970g of pure copper metal .calculate the percent composition of the mixture.
Consider a gaseous binary compound with molar masss of62.09g/mol.when 1.39g of this compound is completely burned in excess oxygen; 1.21g of water is formed. Determine formula of the compound.
An unknown compound is found in tree sap. It has been shown to be composed of 40.0% carbon, 6.7% hydrogen and 53.3% oxygen by mass. It was also discovered that 5 moles of the material has a mass of
Aspartame is an artificial sweetner that is 160 times sweeter than sucrose (table sugar) when dissolved in water. It is marketed as Nutra-Sweet. The molecular formula for aspartame is C14H18N2O5.
By Solving this problem student can find limiting as well as excess reactant and also amount of product formed, as well as amount of excess reactant after the reaction is over.
A compound contains 18.8% sodium, 29.0% chlorine, and 52.2% oxygen, by mass. If the molar mass of the compound is 122.44 g/mol, establish the empirical and molecular formulas.
Solving this question helps the student to understand how to find molecular formula using empirical formula and molar mass.
While aluminiumburns in bromine,aluminium bromide is produced .In a certain experiment,6.0g of aluminium was reacted with an excess of bromine to yield 50.3g aluminium bromide.calculate theoretical
Solving this question helps the student to understand how to find the limiting reactant (alternate method) and how to find theoretical yield.
Phosphorous trichloride can be produced from the reaction of phosphorous, which is an allotrope of phosphorous with the formula P4, with chlorine. If 1.00g P4 reacts with 1.00 g chlorine, which reac
Solving this question helps the student to understand what is happening in a chemical reaction and to balance the given equation.
The initial rate of a reaction which is second order in A is 2.0 x 10-3 M s-1, while the initial concentration of A is 0.0050 M. What is second order rate constant.
The half life of a second order reaction is 49.5s. If the initial concentration of the reactant A is equal to 0.0400 M, what is the second order rate constant.
Chemical Kinetics - Show that only the reactants of the slow step of a reaction are found in the rate law of the reaction.
The rate constant for a first order reaction becomes six times when temperature is raised from 350 K to 400 K. compute the activation energy for the reaction. (Gas constant R = 8.314 J/(mol.K)).
The thermal decomposition of a compound is of first order. If the half life of the compound is 120 min, how long will it take for 90 percent of the compound to decompose.
The conversion of substance X to Y follows second order kinetics. If the concentration of X is tripled, how will it affect the rate of the reaction.
A reaction that is of first order with respect to reactant A has a rate constant 6 min-1. If the initial concentration of A is 5.0 mol L-1, when would the concentration of A reach the value of 0.05
The initial concentration of reactants of a second order reaction is 1.00 M and the final concentration after 25 min is 0.25 M. What is the rate constant for reaction.
Chemical Kinetics - Predict the rate law of a reaction based on the mechanism of the reaction.