Problem: Question 3 What is the molality of 3.04 g of sodium nitrate in 12.19 g water? The molar mass of sodium nitrate is 84.99 g/mol. (Enter only the numerical answer.) Question 4 Calculate the percent water in a 1.28 molal solution of ammonium perchlorate (molar mass 117.49 g/mol).

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Question 3 

What is the molality of 3.04 g of sodium nitrate in 12.19 g water? The molar mass of sodium nitrate is 84.99 g/mol. (Enter only the numerical answer.) 

Question 4 

Calculate the percent water in a 1.28 molal solution of ammonium perchlorate (molar mass 117.49 g/mol).

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Molality concept. You can view video lessons to learn Molality. Or if you need more Molality practice, you can also practice Molality practice problems.

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Based on our data, we think this problem is relevant for Professor Delgado's class at FIU.