Correction for the weight of a Grain of Salt
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How heavy is 0.00000000500 megatonnes?
It's about 85,000,000 times as heavy as a Grain of Salt
The weight of a Grain of Salt is about 0.00000000000000005850 megatonnes.
The mass of a grain of salt is approximately 0.00000000000000005850 megatonnes. Salt consumption varies widely by country; the people of the United States consume a combined total of about 0.057 megatonnes of salt each year.