Which statement is equivalent to 0.5% lead by weight?

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Study for the US EPA Model Lead Inspector Test. Use flashcards and multiple-choice questions with hints and explanations for comprehensive preparation. Get exam-ready with ease!

Multiple Choice

Which statement is equivalent to 0.5% lead by weight?

Explanation:
Converting concentration units helps you compare different ways of expressing the same amount. Percent by weight means parts per hundred, while ppm means parts per million. Multiply by 10,000 to go from percent to ppm, since 1% equals 10,000 ppm. So, 0.5% lead by weight equals 0.5 × 10,000 = 5,000 ppm. Therefore, 5,000 ppm is equivalent to 0.5% lead by weight. For context: 50 ppm is 0.005% (not 0.5%), 0.05% is 500 ppm, and 5% is 50,000 ppm.

Converting concentration units helps you compare different ways of expressing the same amount. Percent by weight means parts per hundred, while ppm means parts per million. Multiply by 10,000 to go from percent to ppm, since 1% equals 10,000 ppm.

So, 0.5% lead by weight equals 0.5 × 10,000 = 5,000 ppm. Therefore, 5,000 ppm is equivalent to 0.5% lead by weight.

For context: 50 ppm is 0.005% (not 0.5%), 0.05% is 500 ppm, and 5% is 50,000 ppm.

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