4. A puddle of coastal seawater, caught in a depression formed by some coastal rocks at...

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Chemistry

4. A puddle of coastal seawater, caught in a depression formedby some coastal rocks at high tide, begins to evaporate as the tidegoes out. If the volume of a puddle decreases to 23% of itsoriginal volume, what is the sodium chloride concentration if itwas initially 0.449 M?
5. Iron (II) can be precipitated from a slightly basic aqueoussolution by bubbling oxygen through the solution, which converts Fe(II) to Fe (III):
Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 4 Fe(OH)⁺ (aq) + 4 OH^- (aq) +O₂(aq) + 2H₂O (L) ? 4 Fe(OH)₃(s)
How many grams of oxygen are needed to precipitate all of theiron in 75 mL of 0.090 M Fe(II)?

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4 A puddle of coastal seawater caught in a depression formed by some coastal rocks at high tide begins to evaporate as the tide goes out If the volume of a puddle decreases to 23 of its original volume what is the sodium chloride concentration if it was initially 0449 M Solution We can assume initial volume 100 mL According to the See Answer

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