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The percent by mass of acetonitrile (MM = 41.05 g/mol) in an aqueous solution is 22.5%. What is the molality of the acetonitrile solution?

The percent by mass of acetonitrile (MM = 41.05 g/mol) in an aqueous solution is 22.5%. What is the molality of the acetonitrile solution?

Chemistry
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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**Question 9 of 10** **The percent by mass of acetonitrile (MM = 41.05 g/mol) in an aqueous solution is 22.5%. What is the molality of the acetonitrile solution?** The image displays a numeric keypad with a range of digits from 0-9, a decimal point, and a key for submitting ('x 10^'). Additionally, there are keys for deletion ('C' and a backspace key). **Components of the screen:** 1. **Header:** - Displays "Question 9 of 10" aligned centrally. - A "Submit" button is located at the top right corner. - A back arrow at the top left, presumably to return to the previous screen. 2. **Question Text:** - States the given information about the solution and asks to calculate the molality. 3. **Answer Input Section:** - A text box labeled with "m" (indicating the unit of molality), - The text box is designed to allow the input of numerical values, which can be entered via the numeric keypad. 4. **Numeric Keypad:** - Contains digits (0-9), - A decimal point ("."), - A key to toggle positive/negative signs ("+/-"), - A backspace key to delete the last character entered, - A 'C' key to clear the input, - An 'x 10 ^' button for scientific notation inputs, - A confirmation/checkmark button to submit or proceed with the given input. 5. **Footer:** - At the bottom, it says "Tap here or pull up for additional resources," indicating more information or help can be accessed at this area. This interface seems designed for students to calculate and input the molality of the acetonitrile solution from the given data in a step-by-step, user-friendly manner.
Transcribed Image Text:**Question 9 of 10** **The percent by mass of acetonitrile (MM = 41.05 g/mol) in an aqueous solution is 22.5%. What is the molality of the acetonitrile solution?** The image displays a numeric keypad with a range of digits from 0-9, a decimal point, and a key for submitting ('x 10^'). Additionally, there are keys for deletion ('C' and a backspace key). **Components of the screen:** 1. **Header:** - Displays "Question 9 of 10" aligned centrally. - A "Submit" button is located at the top right corner. - A back arrow at the top left, presumably to return to the previous screen. 2. **Question Text:** - States the given information about the solution and asks to calculate the molality. 3. **Answer Input Section:** - A text box labeled with "m" (indicating the unit of molality), - The text box is designed to allow the input of numerical values, which can be entered via the numeric keypad. 4. **Numeric Keypad:** - Contains digits (0-9), - A decimal point ("."), - A key to toggle positive/negative signs ("+/-"), - A backspace key to delete the last character entered, - A 'C' key to clear the input, - An 'x 10 ^' button for scientific notation inputs, - A confirmation/checkmark button to submit or proceed with the given input. 5. **Footer:** - At the bottom, it says "Tap here or pull up for additional resources," indicating more information or help can be accessed at this area. This interface seems designed for students to calculate and input the molality of the acetonitrile solution from the given data in a step-by-step, user-friendly manner.
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