Find new volume of the balloon when the pressure is given
A weather balloon has a volume of 750 L when filled with helium at 8 oC at a pressure of 380 torr. What is the new volume of the balloon when the pressure is 0.20 atm and the temperature is -45 oC?
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How many grams of sodium lactate should be added to 1.00 L of 0.150 lactic acid (or) to form a buffer solution with = 4.10? Assume that no volume change occurs when the sodium lactate is added.
100g of water (specific heat=4.184 J/g*C) and 100g of a metal sample (specific heat=0.397 J/g*C) are heated from 25 degrees celcius to 75 degrees celcius. Which substance required more thermal energy to reach 75 degrees celcius?
Select the element potassium (K). Give the wavelength, in Ångströms, the frequency, and the energy of the broadest purple emission
Determine the amount of food you must consume to reach an LD50 exposure, when the concentration of Red Dye #40 in the food is 5.283x10^-4mol/L. Given that LD50=mg/kg and a human weighs 60kg.
At what distance along the central perpendicular axis of a uniformly charged plastic disk of radius 0.6m is the magnitude of the electric field equal to one-half the magnitude of the filed at the center of the surface of the disk?
An open gas turbine is equipped with a regenerator. The compressor is 87% efficient with air entering the compressor at 290K and 100kPa. The pressure ratio is 8.
In the first 12.0 s of the reaction, 1.8×10-2 moles of O2 is produced in a reaction vessel with a volume of 0.260 L. What is the average rate of the reaction over this time interval?
MgNH4PO4.6H2O loses H2O stepwise as it is heated. Between 40c and 60 the monohydrate is formed, and above 100 celcius the anhydrous material is formed. What are the phosphorus percentage of the monohydrate and of the anhydrate material?
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