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# How much water is to be added to dilute 10ml of 10M HCl to make it decimolar?

$(a)\;990ml\qquad(b)\;1010ml\qquad(c)\;100ml\qquad(d)\;1000ml$

$10\times 10=V\times \large\frac{1}{10}$$\Rightarrow V=1000ml$