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It is estimated that about 0.02 m3 of pyrite (density 5 g/cm3) has "disappeared" from a rock face that is adjacent to a lake (original pH=6.7) with dimensions 100 m x 40 m x 10 m. You think that the "disappearance" is due to leaching of the pyrite into the lake. To prove your point, what would the new pH of the lake have to be
if the height of the mercury column in the leveling bulb is 20 mm greater than that in the gas buret and the atmospheric pressure is 650 mm, what is the pressure of the gas trapped in the buret?
Formation of SO3 from the air pollutant SO2 is a key step in the formation of acid rain, according to the following reaction. Use standard enthalpies of formation from Appendix L to calculate the enthalpy change for the reaction.
what antibiotic woiuld you put in an agar plate to ensure that the cells of a bacterial colony contain the plasmid withou an insert? c) which phenotype will indicate the presence of plasmids that contain human DNA fragments?
During a breath, the average human lung expands by about 0.50L. If this expansion occurs against an external pressure of 1.0 atm, how much work in J is done during the expansion?
determine the value Keq at 400K for the decomposition of phosphorus trichloride of [PCl5]=0.135 mol/L, [PCl3]=0.550mol/L.. and [Cl2]=0.550mol/L the equation for the reaction.
Calculate the molar mass of maltose (which is not an ionic compound). (b) The density of the solution is 1.014 g/mL. Calculate the osmotic pressure of the solution.
Assume you dissolve .378 g of the weak acid benzoic acid in enough water to make 1.00e2 ml of solution and then titrate the solution with .200 M NaOH.
a gas has a volume of 95 mL at a pressure of 930 torr. what volume will the gas occupy if the pressure is increased to 970 torr?
Benozoic Acid has a Ka = 6.3*10^-5. A 35.0mL sample of 0.130 M Benzoic Acid is titrated with 0.150M NaOH solution. Find the pH after 0.0mL NaOH is added.
The combustion of propane illustrated by the following reaction releases 2428 KJ per mole of reaction. A sample of propane is burned at 59 degrees celsius and 746 mm Hg. The process produces 39.7 L of CO2(g). How much heat was released?
sample of fertilizer by the procedure of this experiment and obtain 1.000g of MgNH4PO4 * 6H20. Calculate the equivalent mass of P2O5 initially in the sample.
Given that the density of solid sodium is 0.968 g/cm^3, estimate the atomic (metallic) radius of a Na atom. Assess the value obtained, indicating why the result is only an estimate and whether the actual radius should be larger or smaller than the..
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