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You have to prepare a pH 5.06 buffer, and you have the following 0.10M solutions available: HCOOH, HCOONa, CH3COOH, CH3COONa, HCN, and NaCN. Which solutions would you use?
One Step is a product sold as a cleaner/sanitizer and has the formula 2Na2CO3?3H2O2. If 15.175 g of this compound is dissolved in water and diluted to exactly 1 gallon as directed
A person ate 0.999 pound of cheese (an energy intake of 7990 kJ). Suppose that none of the energy was stored in his body. What mass (in grams) of water would he need to perspire in order to maintain his original temperature? (It takes 44.0 kJ to v..
At the equivalence point all carbonate has been converted to bicarbonate NEt ionic equation before the equivalence point: Net ionic equation at the equivalence point
A buffer solution of pH of 9.25 contains P mol of a weak base and Q mol of a salt of its conjugate acid. When 120 cm3 of a 0.0140 mol.dm-3 solution of hydrochloric acid was added to this buffer solution
When ethanol burns C2H5OH + 3O2 ==> 2CO2 + 3H2O , how many moles of water are produced as 48.380 moles of carbon dioxide are produced.
An unknown metal hypochlorite salt, M(ClO)2, is subjected to analysis by iodometric titration: the salt is dissolved in dilute sulfuric acid, treated with excess aqueous KI,and then titrated with Na2S2O3. The unknown metal ion(M2+)
The surface area of an object to be gold plated is 49.7cm2 and the density of gold is 19.3g/cm3. A current of 3.25A is applied to a solution that contains gold in the +3 oxidation state. Calculate the time required to deposit an even layer of gold..
The Group 5A elements can form molecules or ions with thre, five or six covalent bonds. Predict the molecular structure and hybridization of the following substances: NH3, AsCl5 and PF6-.Why does't NF5 or NCl6- form
The inclined plane is supported by a horizontal table. Both the cube and the inclined plane can move without friction along the surfaces that support them (the inclined plane and the table, respectively). What is the normal force on the inclined p..
what molecule would give the following mass spec data. this molecule shows three significant fragment ions. Alpha-fragmentation forms the m/z =59 base peak
Aspirin's mode of action is to make a covalent bond with the active site of the COX II enzyme which inactivates the enzyme. A nucleophilic histidine side chain
When aqueous solution of sodium sulfate and lead nitrate are mixed, lead sulfate precipitates. Calculate the mass of lead sulfate produced when 1.25 L
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