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How is it possible to obtain aniline (aminobenzene)?
Which is a good solvent for lipids?
Which reagent do you use to convert 1-hexanol into 1-chlorohexane?
What do you obtain by reacting 1-pentyne with aqueous H2SO4?
What is the charge of Asp at pH 12?
2-butene is produced by treating 2-butanol with concentrated phosphoric acid. How do you classify this reaction?
Which of the following has the highest boiling point?
What is the relation between the two molecules in the figure?
A solution of copper(II) sulfate undergoes electrolysis for a determined time interval. At the end of the experiment, 200 mg of copper is deposited on the cathode and a certain volume of gas is collected at the anode. Write the molecular formula of the gas and calculate its volume in mL at 25.0°C and 1.00 atm.
Do not subscripts for the formula. For example: H2O is written as H2O.
Molecular formula of the gas: | ||
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Volume of the gas: | mL |
A chemical compound has the following per cent composition: C, 75.0 %; H, 5.00 %; O, 20.0 %. Calculate its empirical formula.
Do not use spaces or subscripts. For example, C6H12O6 is written as C6H12O6.
Empirical formula: |
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Knowing that 10.0 g of the previous compound, dissolved in 390 g of carbon tetrachloride (K ), lowers the freezing point of the solution by 4.80 °C, calculate its molecular formula.
Molecular formula: |
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