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please answer the following 3. How many mL of 7M NaCL are required to prepare 50mL of 0.2M NaCI? 4. What is the concentration of

please answer the following

3. How many mL of 7M NaCL are required to prepare 50mL of 0.2M NaCI?

4. What is the concentration of the diluted solution from Question #3 expressed in mM, uM, and nM? Use scientific notation where appropriate.

5. A solution contains 30g of CaCl2 in a total volume of 150mL. Express the concentration in terms of g/L, % w/v, M, and mM.

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