find the average of Ca Sr Ba?
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The most distinctive xylem cells are the long tracheary elements that transport water. Tracheids and vessel elements are distinguished by their shape; vessel elements are shorter, and are connected together into long tubes that are called vessels. Xylem also contains two other cell types: parenchyma and fibers.
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Dobereiner suggested that calcium ( Ca ), strontium ( Sr ) and ... is nearly or exactly equal to the mean of the atomic weights of the ... Calculate volume percentage
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