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A sapphire gemstone contains 52.7% aluminum, 47.1% oxygen, and traces of iron and titanium. If the sapphire were found to contain 0.155 g of oxygen, what is the mass of the gemstone?
an airplane is pressurized to 650 mmhg. The partial pressure of oxygen is 137 mmhg. If the partial pressure of oxygen drops below 100.mmhg.
Calculate the molar solubility of CaCO3 ( Ksp = 4.5*10-9) neglecting the acid-base character
theoretically feasible in a solution that initially 0.250 M in each ion? c.) If separation is feasibe in eithee (a) or (b), what ranfe of anode potential (vs. SCE) should be used?
Calculate the feed rate of humid air in SCMH? Vapor pressures of water at 32 °C and 4 °C are 35.7 mm Hg and 6.1 mm Hg respectively. Treat air as a mixture of two components: dry air and water vapor.
The limiting current of lead in an unknown solutions is 5.60μA. one mL of a 1.00 x 10-3M lead solution is added to 10.0mL of the unknown solution
calculate the partial pressue of nitrogen? What is the initial pressue of nitrogen?
If 25.6 L of NO2 forms, measured at 35°C and 605 mm Hg, what is the percent yield?
What is the pH of an 85 mL solution containing .215 M NaHCO3 and .203 M Na2CO3?
What is the condensed structural formula of nonane? b. Is it a solid, liquid, or gas at room temperature?
A 6.50 gram sample of an ore containing chromium is dissovled and then treated with an excess of Na3PO4 (aq), which precipitates out all of the chromium in the ore as chromium (III) phospate, CrPO4.
If 3.420g of ^226 Ra (t 1/2= 1620 yrs) is separated from its decay products and placed in a sealed 1L vessel, what is the partial pressure (in torr) of helium after 45 days if the vessel is at 0 degrees C? The half life of Rn is = 3.82 days
What volume of 3.00M HCL in liters is needed to react completely (with nothing left over)
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