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In an accident a container containing ethanol(s.g 0.789) falls down in a room of dimension 1*1*2(all in m). Ethanol forms a layer of 2mm. Ethanol vaporizes and diffuses through a stagnant film of air of thickness 2.5mm. What will be the time required for the water layer to disappear completely. The diffusivity of ethanol in air is 2.567*10-5 m2/s. the total pressure is 1.013 bar and the pressure of ethanol in bulk air is 0.02244 bar and at the ethanol-air interface is 0.02718bar. The temperature is 25.2°C.
A mixture containing 33% of ethanol is mixed with another mixture containing 98% ethanol in the ratio 7 : 3. Find the percentage of ethanol in the mixture formed.
A mixture containing 40% of ethanol is mixed with another mixture containing 60% ethanol in the ratio 1 : 1.4. Find the percentage of ethanol in the mixture formed.
A mixture containing 13% of ethanol is mixed with another mixture containing 31% ethanol in the ratio 13 : 31. Find the percentage of ethanol in the mixture formed.
A mixture containing 42% of ethanol is mixed with another mixture containing 27% ethanol in the ratio 1 : 1. Find the percentage of ethanol in the mixture formed.
Bob just filled his car's gas tank with 20 galions of gasohol , a mixture consisting of 5% ethanol and 95% gasoline. If his car runs best on a mixture consisting of 10% ethanol and 90% gasoline, how many gallons of ethanol must he add into the gas tank for his car to achieve optimum performance?
In what ratio should 20% ethanol solution be mixed with 40% ethanol solution to obtain a 28% ethanol solution?
Which of the following statements are CORRECT? I. Ethanol is a good solvent for organic compounds. II. Boiling and melting points of ethanol are low with respect to water. III. Ethanol is used as tincture iodine.
A mixture containing 65% of ethanol is mixed with another mixture containing x% of ethanol in the ratio 8 : 13. If the percentage of ethanol in the final mixture is 50%, find the value of x.
A mixture containing 25% of ethanol is mixed with another mixture containing x% of ethanol in the ratio 7 : 8. If the percentage of ethanol in the final mixture is 17%, find the value of x.