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A beaker has a mass of 85.6 g when empty and 110 g when it contains 38.7 mL of pentane. What is the density of pentane?
the calorimeter itself absorbs a negligible amount of heat, calculate combustion eneergies (change of energies) for benzene in both kj/g and kj/mol.
A sample of nickel is heated to 99.8 degrees C and placed in a coffee cup calorimeter containing 150.0g water at 23.5 degrees C. After the metal cools, the final temperature of metal andwater mixture is 25.0 degrees C.
A cylinder equipped with a movable piston has a volume of 7.25 L under an applied pressure of 4.52 atm. what is the volume of the cylinder if we decrease
considering the given equation as 2fe2o3s 3cs rarr 4fes 3co2g and compute w when 181 grams of iron iii oxide mm
A mixture of gases contains 10.20g of N2 , 1.80g of H2, and 8.15 of NH3 . The total pressure of the mixture is 1.90atm. What is the partial pressure of N2? What is the partial pressure of H2. What is the partial pressure of NH3.
the electrolysis of molten a12o3 at 980 ordmc is used to produce metallic aluminum. a current of 360 a is used in the
Nitrogen and oxygen do not react appreciably at room temperature, as illustrated by our atmosphere. But at high temperatures, the reaction below can proceed to a measurable extent.
Protein Quantification why should a new standard curve be prepared each time a protein sample must be analyzed for its concentration?
Calculate the standard heat of reaction, or for this reaction using the given data. Also consider that the standard enthalpy of the formation of elements in their pure form is considered to be zero.
Which of the following substances has a standard heat of formation of zero. A. pb @ 1000 degrees C B. C3H8 @ 25.0 C and 1 ATM pressure C.
What is the molarity of sodium acetate. What is the pH of the solution. Please show the steps. (note pK = 4.76) Use log10 for all calculations.
For the following reaction: Fe(OH)2 + H3PO4 ----> Fe3(PO4)2 + H2O [Unbalanced] In a reaction, 3.20 g of Fe(OH)2 is treated with 2.50g H3PO4. If 3.62g of Fe3(PO4)2 is produced in the reaction, what is the percent yield for the reaction?
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