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3. Estimate the number of (a) moles, and (b) molecules of water in all the Earth's oceans. Assume water covers `75%` of the Earth to an average depth of `3\ km`.
3. Estimate the number of (a) moles, and (b) molecules of water in all the Earth's oceans. Assume water covers 75% of the Earth to an average depth of 3\ km. Volume `= 0.75(4π(6.38times)^6\ m)^2(3times10^3) = 1.15 times 10^18\ m^3`
(a)
`(1.15times10^18\ m^3)(1015\ kg//m^3)(1/(18times10^(-3)\ kg)) = 6.55times10^22\ mol`
(b)
`6.55times10^22\ mol(6.02 times 10^23\ //mol) = 4times46 ` molecules
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