Find number of moles of helium and mass of helium in balloon
A spherical balloon with a diameter of 6 m is filled with helium at 20°C and 200 kPa (absolute). Determine the number of moles of helium and the mass of the helium in the balloon.
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Suppose .015 g of dichlorobenzene was combined with 10 ml ofdiethyl ether. This mixture was used to spot a TLC platecoated with silica gel and placed in a chamber of hexene.
How many millicuries of radioactivity are associated with a sample containing 5.10 mg Th (mass number of 229), which has a half-life of 7340 years?
Estimate the max. force required for extruding a cylindrical Al billet of 50mm dia and 75 cm long to a final dfiamter of 10 mm. The average tensile yield stress for Al is 170N/mm2.
If you have 5L of a 10M solution and wish to make 100 mLs of 0.01M, how many mLs of 10M solution would you use and how much water would you add to make the diluted solution?
Charges of 6.0 X 10^-7 C are each located at three corners of a square that is 1.0 m on each side. A charge of -1.3 x 10^-6 C is located at the other corner. What is the electric field at the center of the square
The 12.8 gram of sulfur was produced during the thermal decomposition of hydrogen sulfide . How much hydrogen was produced?
Derive the initial value problem that models B's position on the axis as a function of t (define the Differential Equation and Initial Condition).
What mass of copper is required to remove all the silver from asilver nitrate solution containing 1.43 mg of silver nitrate?
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