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chemistry

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Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of four particles per second. How many years would it take to count 8.10 x 10^23 particles? Assume that there are 365 days in a year.

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    6.5E9 people x (4 particles/second) x (60 s/min) x (60 min/hr) x (24 hr/day) x (365 d/yr) x # yrs = 8.10E23. Solve for #yrs.

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