A solution containing 90% by volume of alcohol (in water) runs at 1 gal/min into a 100-gal tank of pure water where it is continually mixed. The mixture is withdrawn at the rate of 1 gal/min. When will it start coming out 50% alcohol?
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- Concrete will yield (crack and fail) at pressures around 70 Mega Pascals. That’s 70 million Pascals. A 100 tonne load is to be driven over a concrete bridge. Each tyre on the truck has a contact area of around 0.00025 m2 with the bridge surface and transmits the weight force of the load through this contact. What is the minimum number of tyres needed to ensure that the concrete does not fail?Seawater has a salinity of 3.5%, meaning that if you boil away a kilogram of seawater, when you're finished you'll have 35 g of solids (mostly NaCI) left in the pot. When dissolved, sodium chloride dissociates into separate Na+ and CI-ions. Calculate the osmotic pressure difference between seawater and fresh water. Assume for simplicity that all the dissolved salts in seawater are N aCl.The molecular formula of aspartame, the artificial sweetener marketed as NutraSweet Ⓡ, is C14H18 N2O5. How many moles of aspartame are present in 4.50 mg of aspartame? Express your answer using three significant figures. | ΑΣΦ n= ? mol
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