Question

Verizon 00:40 @ 33% D 24 Exit From 1962 to 1982, the composition of the U.S. penny was 95.0% copper and 5.00% zinc by mass, and the average penny had a mass of 3.10 g. How many grams of the mineral smithsonite (ZnCO3, 125.39 g/mol) are required to obtain enough zinc for 1,000 pennies? 310 g 155 g 596 g 522 g 297 g Submit

Answer 1

Гла, mass 1 (елку 2 3-15 composin e Zine a 5.1.1 100 mals as an in I Penny = 5 x 3.1 = 0.155g mall dy zn en 1000 penny = 0.155 x1000 = 155g. Now in znog ind of Zn og contain a 65.4 g og zn x mod of Znog " Issa dy zn - aa Issa = 2.37 med of Zn Coz 65.4 simo 1 Now man dy Znio, rep for (155g of Zn) 2 2.37 mal x 6 125.379 = 297 g of Zn cog