Children under the age of six with more than 0.10 ppm of lead in their blood can suffer a reduction in I.Q. or have behavior problems. What is the molality of a solution which contains 0.10 ppm of lead? A) 4.8 *10^¯¹⁰ m B) 4.8*10^¯⁷ m C) 4.8 *10^¯⁴ m D) 4.8 *10^¯¹ m E) None of these choices is correct.

Question

Quizplus · Accepted Answer

To find the molality, convert ppm to molality using the formula: molality (m) = (ppm * density of solution) / (molar mass of solute * 1000). Assuming the density of water is 1 g/mL, 0.10 ppm of lead (Pb) with a molar mass of 207.2 g/mol gives a molality of approximately 4.8*10¯⁷ m.

Children Under the Age of Six with More Than 0