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QUESTION
A cup of 125 mL of reasonably strong Twinings English BreakfastTM tea has approximately 110 mg of caffeine. 1- Expressed as parts per million, what
A cup of 125 mL of reasonably strong Twinings English BreakfastTM tea has approximately 110 mg of caffeine.
1- Expressed as parts per million, what is the concentration of caffeine in this tea?
2- Seawater was measured to contain 3.90 x 10-3 ppb of dissolved gold. What volume of seawater will contain 1.00 g of gold?
