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What volume in liters of 8.00×10-2 M KH2AsO4 contains 6.20 g KH2AsO4?
Calculate the percent by mass of N in NH4NO2.
Calculate the percent by mass of N in NH4Cl.
Explain what are the concentrations of acetic acid as well as acetate ion in 0.20M acetate buffer, pH 4.90. The pKa of acetate is 4.76.
Examine the diagram of the anti-bonding molecular orbital that results from the out-of-phase combination of two 1 s atomic orbitals. Why is the left atomic orbital labeled (+) and the right one label.
Identify R and R' in Equation 1 when the ester, aspirin, is made from salicylic acid and acetic acid. Calculate the theoretical yield of aspirin to be obtained in this experiment, strating with 2.0g of salicylic acid and 5.0mL of acetic anhydride
A point mass rotates in a circle with l = 2. Calculate the and the possible projections of the angular momentum on an arbitrary axis.
which weighs approximately 8.6 oz. Aluminum has a density of 2.70g/cm^3. What is the approximate thickness of the foil in millimeters?
A synchronous satellite, which always remains above the same point on a planet's equator, is put in orbit around Jupiter to study that planet's famous red spot.
Choose the scientist: write X for Democritus, D for Dalton, T for Thomson, R for Rutherford or B for Bohr - element were identical to all other atoms of the same element this was not correct.
Draw the structure of the following three isomeric amides with chemical formula C6H11NO. Draw all three structures in the same window, DO NOT separate them with an arrow
Explain why the melting temperature of a double-helical DNA increases when the Na+ concentration increases.
If 3.00 moles of ZnS are combined with 4.00 moles of O2 how many moles of ZnO can be produced and how many moles of the excess reactant will be left over?
what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of 7.2 104 kg of coal that is 0.33 mass % sulfur?
An enzyme catalyzed reaction is carried out in a 50mL solution containing 0.1 M TRIS buffer. The pH of the reaction mixture at the start was 8.0. As a result of the reaction, 00002 mole of H+ were produced. Explain what is the ratio of TRIS base t..
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