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9. How much 99.00% sodium carbonate (106.00 g/mol) is needed to make a 1.500 L of 1.250 M Na⁺ solution? CHOICES:99.38 g, 100.4 g, 198.8 g, 200.8 g

9. How much 99.00% sodium carbonate (106.00 g/mol) is needed to make a 1.500 L of 1.250 M Na⁺ solution? CHOICES:99.38 g, 100.4 g, 198.8 g, 200.8 g

World of Chemistry, 3rd edition
World of Chemistry, 3rd edition
3rd Edition
ISBN:9781133109655
Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Chapter15: Solutions
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9. How much 99.00% sodium carbonate (106.00 g/mol) is needed to make a 1.500 L of 1.250 M Na⁺ solution?
CHOICES:99.38 g, 100.4 g, 198.8 g, 200.8 g
 
10. A 0.7802-g sample is dissolved in cyanide solution to convert its sulfur (32.066 g/mol) to thiocyanate. 43.51 mL of 0.2352 M potassium iodate solution in strong hydrochloric acid. What is the % w/w S of the sample?  
2SCN- + 3IO3- + 2H+ + 6Cl- ----> 2SO4- + 2CN- + 3ICl2- + H2O
CHOICES: 14.02%, 28.04%, 42.06%, None of these
 
 
 
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