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    Question

    0.005% is equal

    to
    A 50 ppm Correct Answer Incorrect Answer
    B 50 ppb Correct Answer Incorrect Answer
    C 0.5 ppm Correct Answer Incorrect Answer
    D 0.005 ppb Correct Answer Incorrect Answer

    Solution

    Step 1: Understand the Units Percentage (%): A ratio expressed as a fraction of 100. Parts per million (ppm): A ratio expressed as a fraction of 1,000,000. Parts per billion (ppb): A ratio expressed as a fraction of 1,000,000,000. Step 2: Convert Percentage to Decimal First, convert 0.005% to its decimal form: [ 0.005% = {0.005}/{100} = 0.00005 ] Step 3: Convert Decimal to ppm To express 0.00005 as ppm, multiply by 1,000,000 (since 1 ppm = 1 part per 1,000,000): [ 0.00005 * 1,000,000 = 50 ppm ]

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