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If High purity benzoic acid [C6H5COOH; H(rxn) = -3227 kJ/mol] is a combustion standard for calibrating bomb calorimeters. If an unknown quantity of the benzoic acid is burn up in the calorimeter (heat capacity = 1365 J/C) containing exactly 800 g of water also results in a temperature increase of 5.62 C, explain how many moles of the benzoic acid was burned?
Indium has only two naturally occurring isotopes. The mass of indium-113 is 112.9041 and the mass of indium-115 is 114.9039 .
What is a zymogen. How are they activated. Give an example. What is a transition state? And what is its relationship with the active site
What solute particles are present in an aqueous solution of NH4Cl? Express your answer as a chemical formula. If there is more than one answer, separate them by a comma. Include charges where necessary.
Remember that M1V1=M2V2. What volume of distilled water do you need to add to dilute 10 mL of a 100 mM Tris- HCl buffer solution to a concentration of 10 mM
1 calculate the heat of combustion for c2h6 from the following informationc2h43o2-gt
Calculate the partial pressure of each gas in the container. Express the pressure values numerically in atmospheres, separated by commas. Enter the partial pressure of methane first, then ethane, then propane.
An electric power station annually burns 3.3 107 kg of coal containing 1.4 percent sulfur by mass. Calculate the volume of SO2 emitted at STP
The pressure on 200 ml of oxygen gas changes from 380 mm hg to 760 mm hg. The temperature does not change. What is the new volume of the oxygen gas?
Chemical analysis of the two compounds reveals that 0.25 mol ACl 2 has a mass of 100.0 g and 0.50 mol BCl 2 has a mass of 125.0 g. Determine what are the molar masses of ACl 2 and BCl 2 ?
The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.50 mL of a 0.350 M HCL solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
A zero-order reaction has a constant rate of 2.00×10-4 . If after 50.0 seconds the concentration has dropped to 6.00×10-2 , what was the initial concentration?
when the following equation is completed and balanced for the reaction in an acidic solution what is the proper coefficient for H+, Zn(s)+ Cr2O7^2-(aq)---> Zn^2+ (aq)+ Cr^2+(aq)
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