1.

What is the molecular formula of borax ?

Answer»

`Na_2B_4O_7 . 4H_2O`
`Na_2B_4O_10 . 10H_2O`
`NA B_4O_7 . 10H_2O`
`Na_2B_4O_7 . 10H_2O`

ANSWER :D


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