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A 20.0 gram aluminum ball (specific heat 0.90 J g-1 °C-1) at 80 °C was placed in 50 grams of water initially at 22.9 °C. What is the final temperature of the water and aluminum assuming no heat was lost during the energy exchange.
After 63.0 min, 24.0% of a compound has decomposed. What is the half-life of this reaction assuming first-order kinetics
How many ATP can be synthesized (theoretically) when the electrons of CoQH2 are transferred to cytochrome C? Justify quantitatively by first calculating delta G naught prime.
Which of the following compound or compounds has electrovalent, covalent, co-ordinate as well as hydrogen bond. Explain the reasons for each making appropriate use of diagrams wherever necessary.
A molecular orbital in a diatomic molecule that has a nodal plane containing the internuclear axis and no nodal plane perpendicular to the internuclear axis is of
A sample is found to contain 1.00e-5 g of salt. Express this quantity in kilograms
A compound in spectrum shows a broad absorption at 3300 cm-1 and a sharp absorption at 1710 cm-1 what functional group does it contain
How would you prepare a liter of "carbonate buffer" at a pH of 10.10? You are provided with carbonic acid (H2CO3), sodium hydrogen carbonate (NaHCO3), and sodium carbonate (Na2CO3). Ka value of H2CO3= 4.2x10^-7
an 8 g sample of a copper ore was dissolved in an acid solution and then reacted with NO3- from a KNO3 salt solution. it required 71.5 ml of a .155 M KNO3 solution to fully react the copper in the ore sample.
2.4 g of a hydrocarbon fuel is burned in a calorimeter that contains 262 grams of water initially at 25.00 C. After the combustion, the temperature is 26.55 C.
you have 1005.3 g of a bleach solution. the percent by mass of the solute sodium hypochlorite naocl is 3.62. how many
A buffered solution is made by adding 50.0 g NH4Cl to 1.00 L of a 0.75 M solution of NH3. Calculate the pH of the final solution. (Assume no volume change.)
Consider the combustion of glucose (C6H12O6). This reaction is 1. spontaneous at all temperatures 2. non-spontaneous towards lower temperatures 3. non-spontaneous at all temperatures 4. spontaneous towards higher temperatures
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