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1 May, 09:37

The mass of the ocean is about 1.8 X 10^21 kg. If the ocean contains 1.076% sodium ion, Na+, what is the mass in kilograms of sodium in the ocean?

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  1. 1 May, 10:04
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    Mass of sodium = Mass of ocean x percentage mass of sodium

    = 1.8 x 10²¹ x 1.076 / 100

    = 1.94 x 10¹⁹ kg
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