8. What is the molar fraction of benzene in a solution made by mixing 10 g...

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Chemistry

8. What is the molar fraction of benzene in a solution made bymixing 10 g of benzene (Molecular Weight 78.11) and 10 g of toluene(Molecular Weight 92.14)? Show two significant digits in youranswer.
9. Radioactive Iodine-131, with a half-life of eight days, is acommon fission product and thus is present in high levels inradioactive fallout. How long will it take for initial radiationintensity to drop 8-fold?
10. In an experiment, a sample was 90% decomposed in 24 min.Approximately how long would this decomposition have taken if thesample had been heated 20Â°C higher? (Hint: Assume the rate doublesfor each 10Â°C rise in temperature.)
11. Find which kind of catalyst is necessary to facilitate thereaction between molecular nitrogen and molecular hydrogen to makeammonia (several words description)

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8 What is the molar fraction of benzene in a solution made by mixing 10 g of benzene Molecular Weight 7811 and 10 g of toluene Molecular Weight 9214 Show two significant digits in your answer moles of benzene mass See Answer

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