A 100.0 mL buffer is to be made so that the [ C2H3O2 ] = 0.154 M C2H3O2. How many grams of NaC2H3O23H20 (s) are needed? Use this Periodic Table when calculating your molar mass.

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A 100.0 mL buffer is to be made so that the [ C2H3O,] = 0.154
M C2H3O2. How many grams of NaC2H3O2-3H20 (s) are
needed?
Use this Periodic Table when calculating your molar mass.
IMPORTANT: When entering your answer:
• Enter the number only (no units)
• Do not leave any spaces
• Use a leading zero before the decimal when necessary
Report your number to 2 decimal places (regardless of the
significant figures)
• Correctly round your answer to the 2nd decimal place (margin
of allowed error is only ± 0.01, so always use un-rounded
numbers in your calculations). If the last digits are zeros they
will not display once you click away, but the answer will still
be marked correct.
Examples: 12.34 or 0.56
Transcribed Image Text:A 100.0 mL buffer is to be made so that the [ C2H3O,] = 0.154 M C2H3O2. How many grams of NaC2H3O2-3H20 (s) are needed? Use this Periodic Table when calculating your molar mass. IMPORTANT: When entering your answer: • Enter the number only (no units) • Do not leave any spaces • Use a leading zero before the decimal when necessary Report your number to 2 decimal places (regardless of the significant figures) • Correctly round your answer to the 2nd decimal place (margin of allowed error is only ± 0.01, so always use un-rounded numbers in your calculations). If the last digits are zeros they will not display once you click away, but the answer will still be marked correct. Examples: 12.34 or 0.56
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