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Assume a scuba diver is working at a depth where the total pressure is 5.0 atm (about 50 m below the surface). What mole fraction of oxygen is necessary in order for the partial pressure of oxygen in the gas mixture the diver breathes to be 0.27 atm?
A phosphate buffer solution (25.00 mL sample) used for a growth medium was titrated with 0.1000 M hydrochloric acid. The components of the buffer were sodium monohydrogenphosphate and sodium dihydrogenphosphate
A metallic solid with atoms in a face-centered cubic unit cell with an edge length of 385 pm has a density of 6.84 g/cm3. Calculate the atomic radius of the metal.
how much heat is required to warm 215 g of ice from -44.1degc to 0.0degc melt the ice warm the water from 0.0degc to
Every measurement has a measurement uncertainty. Discuss how precise and accurate measurement can be achieved in spite of the inherent measurement uncertainty.
What is the solubility of MnS, in grams per liter, in a buffer solution that is 0.115M HC2H3O2 - 0.505 M NaC2H3O2? For MnS, Kspa=3x10^7.
The rate of the reaction doubles when the concentration of CH3Cl is doubled and it quadruples when the concentration of H2O is doubled. What is the unit for K?
cus 2agno3aq cuno32aq 2agswhat mass of copper is required to remove all the silver from asilver nitrate solution
Calculate the pH of a buffer solution that is 0.250 M in HCN and 0.170 M in KCN. For HCN, Ka = 4.9 x 10^-10 (pka = 9.31). Use the equilibirum approach to calculate
A piece of silver with a mass of 418 g has a heat capacity of 99.1 J/Celcius. What is the specific heat of silver
a 10.0 l gas cylinder has been filled with 7.40 moles of gas. you measure the pressure to be 3.90 atm. what is the
write the molecular equation ionic equation net ionic equation and indicate the spectator ions for the precipitation
explain the structural feature of acetanilide molecule.1. acetanilide is moderately soluble in hot water but much less
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