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How many grams of nitrogen are found in 50.0 grams of potassium nitrate?
calculate the molar concentration of oh - ions in an 1.37 m solution of hypobromite ion bro- kb 4.0
Draw all the structural isomers for the molecular formula C4H9Br. Be careful not to draw any structures by crossing one line over another
what is the band gap energy in kilojoules per mole if bule diamonds absorb orange light with a wavelength of 675nm
Assume a certain adult requires 2.7 × 102 mL of pure oxygen per minute and assume inhaled air contains 20.0 percent oxygen by volume and exhaled
1. If a pressure in the system is 1.2 atm, its volume is 31 L and the temperature is 87 C, what amount of gas is present in the system? Show work
a molecule has an excited state electronic energy level that emits radiation of 1lambda 360 cm-1 when it falls to the
calculate the volume of methane ch4 measured at 300. kand 1.09 atm that can be produced through the
At 20 degrees C the vapor pressure of pure methanol (CH3OH) is 89.0 torr and of pure water (H2O) is 17.5 torr. A solution of methanol and water has a total vapor pressure of 52.9 torr at 20 degrees C.
If 500 mL of air contains 2 x 1022 particles (atoms and molecules), how many particles do you inhale in one day if you breathe 15000 L of air?
What is the density of mercury in pounds per cubic inch (lb/in3)? What are some of the physical and chemical properties of Mercury?
Zinc metal reacts with excess hydrochloric acid to produce hydrogen gas according to the following equation: Zn(s) + 2HCl(aq) ZnCl2(aq) + H2(g) The product gas, H2, is collected over water at a temperature of 25 C and a pressure of 755 mm Hg
An empty cell exhibited 11.5 interference fringes in the region of 1050 to 1580 cm-1. What was the path length of the cell
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