3. Silicon is produced for the chemical and electronics industries also by the following reaction. Na2SiF@(s)4 Na(s) Si(s) + 6 NaF(s) (a) How many moles of Na,SiF6 are reacted when 75.0 g of Si are produced? Show your work. (b) How many grams of Na2SiFg are reacted when 75.0 g of Si are produced? Show your work. 4. In a laboratory experiment, 20.0 g of Cu were reacted with 90.0 g HNO3. 3 Cu 8 HNO3 3 Cu(NO3)2 4 H2O 2 NO Answer parts (a) - (c). Show your work. (a) Calculate in grams the mass of Cu(NO3)2 that can be theoretically produced? (b) Based on your answer in 4(a) which reactant is the limiting reactant and which reactant is in excess? (c) When 20.0 g of Cu reacts with 90.0 g HNO3, and 40.5 g of Cu(NO3)2 is recovered, what is the percent yield of Cu(NO3)2? 6

3. Silicon is produced for the chemical and electronics industries also by the following reaction. Na2SiF@(s)4 Na(s) Si(s) + 6 NaF(s) (a) How many moles of Na,SiF6 are reacted when 75.0 g of Si are produced? Show your work. (b) How many grams of Na2SiFg are reacted when 75.0 g of Si are produced? Show your work. 4. In a laboratory experiment, 20.0 g of Cu were reacted with 90.0 g HNO3. 3 Cu 8 HNO3 3 Cu(NO3)2 4 H2O 2 NO Answer parts (a) - (c). Show your work. (a) Calculate in grams the mass of Cu(NO3)2 that can be theoretically produced? (b) Based on your answer in 4(a) which reactant is the limiting reactant and which reactant is in excess? (c) When 20.0 g of Cu reacts with 90.0 g HNO3, and 40.5 g of Cu(NO3)2 is recovered, what is the percent yield of Cu(NO3)2? 6

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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