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| • | How many grams of
solute are needed to |
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| prepare: |
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| • | A. 2.50
x 102 g of 5.00% (W/W) NH4Cl |
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| • | B. 2.50
x 102 mL of 3.50% (W/V) Na2CO3 |
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| • | Calc the amount
of water that must be |
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| added to 5.00 g
of urea (NH2)2CO in the |
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| preparation of a
16.2 W/W % by mass |
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| solution. |
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