The answer to each of the following questions is a single digit integer, ranging from 0 to 9. W...
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The answer to each of the following questions is a single digit integer, ranging from 0 to 9.
What is the degree of hardness of a sample of water containing \( 6 \mathrm{mg} \) of \( \mathrm{MgSO}_{4} \) (molecular mass 120 ) per kg of water?
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