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Question- CaO can be used as a drying agent. One such application occurs when water is added to dry concrete or cement. The reaction that occurs is
CaO(s)+H2O(l)?Ca(OH)2(s)
The product is commonly called slaked lime.
Assuming the commonly utilized standard-state temperature of 25?C compute ?S total for this reaction using table from the table below.
Please show how you obtained the answer
Elemental analysis of the solid suggested the composition C9H10O3. The solid melted at 117 °C and gave the following nmr spectra and the ir spectrum. What is this material and why and how did it come to be in both of these sources?
MnO4-(aq) I-(aq)?Mn2 (aq) I2(s), the number of electrons gained in cathode is ( )
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 300mL of a solution
State mathematical equation that show how you will compute the detected activity from the count rate the sample KCl
2 drops of methyl orange indicator are added to a 25.0 mL sample of strontium hydroxide. A 0.073 M HCl solution (titrant) is dispensed into the solution (analyte). The solution turns from yellow to red after the addition of 29.5 mL.
A gas is confined to a cylinder under constant atmospheric pressure P. When the gas undergoes a particular chemical reaction, it releases 79 kJ of heat and does 18 kJ of PV work on its surroundings.
If 1.0mL of 10-ON NaOH is added to 1L of the buffer prepared in (a) how much would the pH change
solvent to be used to extract a compond from an aqueous solution and when carrying out an extraction, what are the advantages/ disadvantages of having your extraction solution more/less dense than water?
The following compound has two stereoisomers. One has a dipole of 0 D, and the other has a dipole moment of 2.95 D. Draw the structure of the stereoisomer with dipole moment of 0 D.
There are two sources of oxaloacetate for entry into gluconeogenesis. how could you experimentally determine the relative contribution of each of these sources to the overall flux oxaloacetate through gluconeogenesis? Draw out your experiment.
A solution containing a mixture of metal cations was treated with dilute HCl and no precipitate formed. Next, H2S was bubbled through the acidic solution
calculate the concentration of Hg2 +2 in a saturated aqueous solution of (Hg2)3[Co(CN)6]2 which dissociates into mercurous ion and Co(CN)6 -3 (cobalticyanide).
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