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The best reagent or sequence of reagents for carrying out transformation A and transformation B are _____ and _____, respectively.
I. PBr3II. HCl (gas), etherIII.SOCl2, pyridineIV. 1. Mg, ether 2. NBSV. HBr(gas), ether
A 3.00 g sample of a salt dissolves in 9.10 g of water to give a saturated solution at 25°C. What is the solubility (in g salt/100 g of H2O) of the salt?
The shielding of electrons gives rise to an effective nuclear charge,Zeff , which explains why boron is larger than oxygen. Estimate the approximate Zeff felt by a valence electron of boron and oxygen, respectively
need to generate ammonia from ammonium chloride to use in a reaction. should you use sodium bicarbonate or sodium carbonate?
At 25C, H2O2 decomposes according to the following equation. 2H2O2(aq) => 2H2O (l) + O2(g) .55V
What is the solubility of M(OH)2 (Ksp = 3.2e-13) in a solution buffered at pH = 9.84 solubility = M
The empirical formula is NO2. If the molar mass is 92g/mol give the molecular formula. Please explain.
Calculate the volume of 0.500M hydrochloric solution that must be added to 20.5g of sodium ethanoate to make 500cm3 a buffer of pH4.50.The pKa value of ethanoate acid is 4.76.
the total elute from the column was diluted to 250 mL and a 50 mL aliquot was titrated with 11.35 mL of 0.10359 M sodium hydroxide. Calculate the percentage of ammonium ion in the sample.
An unknown hydrate of calcium nitrate, Ca(NO3)2 * XH2O, is heated to give 30.5% water. What is the water of crystallization (X) for the hydrate
Calculate a) the amount of ethylene glycol required. b) the amount of by product evolved and c) the amount of polyester produced.
some physical properties of water are shown below.nbspfreezing point 0.00degcnbspboiling point 100.00degcnbspkf
What is the kinetic energy in joules of this baseball when it is thrown by a major-league pitcher at 94.0mph?
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