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A sample of gas has an initial volume of 2.8 L at a pressure of 753 mmHg .If the volume of the gas is increased to 3.6 L, what will the pressure be? (Assume constant temperature.) Express your answer using two significant figures.
A compound composed of sulfur and fluorine is found to contain 25.24% by mass of sulfur. If the molar mass of the compound is 254.11 g/mol, what is its molecular formula?
A woman had a heart attack caused by thrombus. the cells immediately downstream from the thrombus were deprived of oxygen and , as a result, increased
A typical commercial-grade phosphoric acid solution is 75% phosphoric acid by mass, and has a density of 1.57 grams per milliliter. What are the molarity and molality of H3PO4 in this acid?
The mixture has a density of .8252 g/l at temperature of 298 and pressure of 1 atm. What percentage of gas in container is He?
calculate the number of moles of KOH in 5.5mL of a .36 M KOH solution. what is the pOH of the solution?
Calculate the percent yield of salicylic acid (from 1.00 mmol isolated) from 7.00 g of Ben-Gay ointment. Ben-Gay ointment is 16% menthol
If 57.0 of solution is needed to precipitate all the sulfate ion in a 756 sample of , what is the molarity of the solution?
Hydrogen sulfide is a common and troublesome pollutant in industrial wastewaters. One way to remove H2S is to treat the water with chlorine, in which case the following reaction occurs
I need help in describing the adverse effects caused by exposure to radiation. Include some specific exposure levels associated with these significant health effects.
Estimate Keq for the following equilibria at 425 K. Note that H2O is present as a gas rather than as a liquid. R = 8.3149 J/(mol*K).
Ocean water typically contains 35 moles of salt ions dissolved in each 1000 moles of water. Assuming that ocean water has the same density as pure water convert this ratio into a molarity and calculate the expected osmotic pressure of ocean water.
A 0.15 M solution of chloroacetic acid has a pH of 1.86. What is the value of Ka for this acid?
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