Mastering chemistry: Ch 02 HW Adaptive Folkow-Up secure https://session masterin

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Mastering chemistry: Ch 02 HW Adaptive Folkow-Up secure https://session masteringchemistrycom/myct/itemview?assignmentproblemID-797638o6 Chem 101 Spring 2017 Che2HWAdapore Eolomua Data Interpretation and Analysis Exercise 2.142. Heavy Metals in Recycled Pap... Item 5 Part C What is the total mass ofte sve metas for the April sample found in the 1.500 dmax oo600 em sample? (Recall that the average density of the samples is 8000 kg/mr) milligrams to three significant figures. Express the mass in Submit Hints My Answers Gave up Review Part Part D Lead has four stable isotopes 2 Pb, Pb, Pb. Pbwth percent abundances of 1.40% 24.10% 22.10%, and 52.40%, respectively, Determinethe mass mg of Pb in the April sample. Express the mass in milligrams to two significant figures. 2.1 Hint M Anwen Give up Review Part Incorrect one attempt remaining: Try Again MacBook Air

Explanation / Answer

Volme of board = 1.5dm2*0.06 cm =1.5*0.01m2*0.06*0.01m =9*10-6 m3

density =800 kg/m3

mass= volume* density = 800*9*10-6 kg=0.0072 kg =7.2 mg

2. mass % of Pb 208=52.4 ,i.e 0.524

atomic weight of Pb208= 208

mass of Pb208= 0.524*208 =109 gm =109*103 mg

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