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Suppose you have a bucket of sand containing 9.5 billion grains of sand (9.5 × 109...

Suppose you have a bucket of sand containing 9.5 billion grains of sand (9.5 × 109 grains). Most of the grains of sand are white, but there are some brown grains mixed evenly throughout.

If the concentration of brown sand is 6.0 ppm, how many grains of brown sand are in the bucket?

If the concentration of brown sand is 6.0 ppb, how many grains of brown sand are in the bucket?

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