Question

A sample of rubbing alcohol contains 142 g of isopropyl alcohol (C3H7OH) and 58.0 g of water.
What are the mole fractions of alcohol and water?

Answer 1

Answer:

mole fraction of alcohol = 0.429

mole fraction of water  = 0.57

Explanation:

molecular mass of isopropyl alcohol = 60

molecular mass of water = 18

moles of alcohol = 142/60 = 71/30

moles of water = 58/ 18

So mole fraction of alcohol =$\frac{moles of alcohol}{total moles}$

                                             = 0.429

mole fraction of water =  1 - 0.43

                                     = 0.57

Answer 2

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Answer 3

New tasks and routines engage the brain and body, forcing a concentrated focus. The disadvantage of specialization means taking the chance that complacency could lead to missteps, which can cost the company money and compromise safety.