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Determine the boiling point of a solution that contains 78.8 g of naphthalene (C10H8; molar mass = 128.16g/mol) dissolved in 722 mL of benzene (d = 0.877 g/mL). Pure benzene has a boiling point of 80.1 degrees C and a boiling point depression constant of 2.52 degrees C/m.
The rate constant for the second order reaction 2NO2 ???&??; N2O4 is 2.79 L/mol •min at 48 oC. If the initial concentration of NO2 is 1.05 M , what is the half-life
For each of these three chemicals, state how the "parity rule" is (or is not) obeyed by the MS data. If this question cannot be answered for a chemical, state briefly why not (for example, what additional data would be needed or why the situation ..
Define in terms of the electronic structure of an element, chemical activity as it relates to metals, nonmetals, and noble gases. Discuss the change in chemical activity of metals as you go down a group.
Assume air in tank is mixed and that air is an ideal diatomic gas. For a heated tank what heat rate must be applied to keep the tank air temperature constant? For a perfectly insulated tank, what is the tank air temperature after 100 seconds? The ..
The osmotic pressure of an aqueous solution at 300 K is 120 kPa. Calculate the freezing point of the solution.
About how many gallons of CO2 are produced by an incandescent 60-W lightbulb burning for an hour
when nitrogen gas reacts with hydrogen gas ammonia gas is formed. how many grams of hydrogen gas are required to react
When lithium iodide is dissolved in water the solution becomes hotter. Why does the solution form? What drives the process
A gaseous mixture contains 420.0 Torr of H2(g), 391.3 Torr of N2(g), and 79.5 Torr of Ar(g). Calculate the mole fraction, X, of each of these gases.
How much hexanol was in the sample represented by this chromatogram? ( chromatogram shows retention time for butanol to be 10 min and retention time for pentanol to be 20min.
What is the pH when 100 mL of 0.1 M HCl is titrated with 50 mL of 0.2 M NaOH?
A student is given chloroacetic acid as an unknown weak acid. Calculate the number of milliliters of 0.100 M NaOH required to reach the equivalence point in titration of 0.4840 grams of this acid
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