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An ideal gas is compressed reversibly at a constant temperature. The compression reduces the volume b 1.80L. The final pressure and volume are 1.97 bar and 2.14L respectively. How much heat per mole (if any) was exchanged by it's system and it's surroundings? And in which direction did the heat flow?
A certain carbon-hydrogen compound contains 89.94% C by mass and the remainder is hydrogen. What is the empirical formula
What mass of ethylene glycol, HOCH2CH2OH, must be dissolved in 4.510 kg of water to result in a freezing point of 18.0°C? What is the boiling point of the same solution?
Describe an electrochemical cell tthat would have the following net equation, by answering the following questions.
A solution has a volume of 2.0 L and contains 36.0 g of glucose. If the molar mass of glucose is 180g/mol, what is the molarity of the solution? Answer must be expressed in dimension analysis.
A portable photometer with a linear response to radiation registered 73.6 μA with a blank solution in the light path. Replacement of the blank with an absorbing solution yielded a response of 24.9 μA. Calculate
what volume of oxygen measured at 0.891atm and 18 degrees celsius is needed to burn completely 4.18l of butane measured
A compound CN is a weak organic base; a 3.50 x 10-2 M solution has a pH = 11.3. Calculate the kb for CN. The reaction is CN+H2O-->CNH+ + OH-
The pH of a 0.0100 M hypothetical acid, HA, is 4.00. Calculate the Ka for this hypothetical acid.
The half life of a first-order reaction was found to be 439 s; what is the time constant for the reaction
A buffer initially contains 0.10 mol acetic acid and 0.13 mol of sodium acetate in 1.00 L. 0.02 mol of potassium hydroxide is added to the buffer
Calculate the change in pH when 8.00mL of 0.100M HCl(aq) is added to 100.0mL of a buffer solution that is 0.100M in NH3(aq) and 0.100M NH4Cl(aq).
Consider the Lewis structure for the polyatomic oxyanion shown below, where X is an element from the 3rd period (Na- Ar). By changing the overall charge, n, from 1-to 2 -to 3 - we get three different polyatomic ions.
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