Help me on these questions from Chemistry i need your help and plz show your work?

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nubianprincess1992

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im doing my chemistry homework and i need HELP!!!! plz help me

Calculate the molarity of each of the following solutions.

A. 0.40 mol of NaCl dissolved in 1.6L of solutions (pl show work)

B.20.2g of potassium nitrate, in enough water to make 250.0mL of solution

2. Calculate the number of grams of solute needed to prepare each of the following solutions

A. 2500.0 mL of a 3.0M solution of potassium hydroxide, KOH

B. 2.0liters of 2.0M nitric acid, (HNO3) solution

3. what is the molarity of a solution that contains 212.5g of sodium nitrate in 3.0 liters of solution

4. You must perpare 300.0mL of 0.750M NaBr solution using 2.00M NaBr stock solution. How many milliliters of stock solution should you use

5. In order to dilute 1.0L of a 6.00M solution of NaOH to 0.500M solution how much water must you add

6. What concentration in percent by volume %(v/v) of the folowing solutions
A. 60.0mL of methanol in total volume of 500.0 mL
B. 25.0 mL of rubbing alcohol (C3H7OH) diluted to a volume of 200.0mL with water

7. How many grams of solute are needed to prepare each of the following solutions

A. 1.00 L of a 3.00% (m/m) NaCl solution?
B. 2.00 L of 5.00%(m/m) KNO3 solution?

Plz show ur work
 
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