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A certain indicator HIn has a pKa of 3.00 as well as a color change becomes visible when 7.00% of the indicator has been converted to IN-. Explain at what pH is this color change visible?
Which reagents would you select to synthesize 2-bromo-3-methylbutane from 2-bromo-2-methylbutane? a) (1) NaOEt in EtOH, and (2) HBr b) (1) NaOEt in EtOH, and (2) HBr in presence of ROOR
What carbonyl compound would the following condensation product? Which of the following could result from a self-aldol condensation followed by dehydration?
Given the following reaction: 2 O2 + CH4 CO2 + 2 H2O What mass of CH4 is required to completely react with 100 grams of oxygen.
Chemical analysis of the two compounds reveals that 0.25 mol ACl 2 has a mass of 100.0 g and 0.50 mol BCl 2 has a mass of 125.0 g. Determine what are the molar masses of ACl 2 and BCl 2 ?
The molar ratio of nitrogen to methane is known to be 0.26. Find the mole fraction and mass fraction of each component, and the average molecular weight of the mixture.
Which of the following is a mechanism by which enzymes assist in formation of a transition state intermediate? a) Preventing interference by water molecules.
Restricting yourself to straight-chain (unbranched) compounds, draw the structures of the possible constitutional isomers of pentene. There are two "variables" -- the position of the double bond; and cis/trans isomerization at that double bond.
density of 9.14g/cm^3 is placed in a 30.0mL cylinder. Water level rises to 34.5mL. what is the mass of the piece of metal?
if you take a 12.5 mL portion of the stock solution and dilute it to a total volume of 0.600L what will be the concentration of the final solution?
a student performs twomelting point determinations on a crystalline product. in onedetermination capillary tube
Suppose that the atomic mass unit (amu) had been defined as one-sixth of the average mass of an atom of fluorine instead of one-twelfth of the mass of an atom of carbon-12. What would the average atomic mass of phosphorus be on this new scale
a certain element has three isotopes. the isotopic masses amu and abundances in are 159.37 30.60 162.79 15.79 and
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