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Mixtures of helium and oxygen can be used in scuba diving tanks to help prevent "the bends." For a particular dive, 46L He at 25°C and 1.0 atm and 12L O2 at 25°C and 1.0 atm were pumped into a tank with a volume of 5.0L. Calculate: a. the partial pressure of He at 25°C b. the partial pressure of O2 at 25°C c. the total pressure in the tank at 25°C
What mass of liquid water at room temperature (25 C) can be raised to its boiling point with the addition of 31.0 kJ of energy
Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper (II) nitrate are mixed.
Ammonium Hydrogen sulfide decomposes on heating, NH4HS(s) NH3 (g)+H2S(g). If Kp for this reaction is .11 at 25 degrees celcius (where partial pressures are measured in atmospheres), what is the total pressure in the flask at equilibrium
According to the following reaction, how many moles of ammonium nitrate are necessary to form 0.625 moles water
At body temperature (98.6F = 37.0C), Kw has the value 2.4X10^14. If the pH of blood is 7.4 under these conditions, what are the concentrations of H3O+ and OH-?
Identify which sets of quantum numbers are valid for an electron. Each set is ordered (n,\ell,m_\ell,m_s).
The volume of seawater on Earth is about 3.3 x 10^8 mi^3. Because it contains salts, mostly sodium chloride, its density is about 1.03 g/mL, a little higher than that of pure water. The concentration of sodium chloride is about 3.5% by mass.c
The thermal decomposition of phosphine (PH3) into phosphorus and molecular hydrogen is a 1st order reaction 4PH3(g)--- P4(g)+6 H2(g) The half life of the reaction is 35.0 s at 680C calculate a)
Which of the following is a tertiary alkyl halide. Can you please expalin why A) (CH3)2CHBr B) (CH3)2CHCH2CI C) (CH3)3CCI D) CH3CH2CHBr2 E) CH3CHBr2
In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink.
Calculate the molecular weight of a polymer if a 100 mL solution of 6.5 grams of the polymer in toluene has an osmotic pressure of 0.044 atm at 27 celsius
Add electron pairs to show the bonds between the atoms. Assigning the remaining valence electrons so that each atom has an octet of electrons, write the Lewis structure for COCl2 in the box.
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