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24-11-2016
Chemistry

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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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scme1702 scme1702

27-11-2016

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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