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15 December, 16:13

Which is closest to the volume of 0.20 M sodium hydroxide solution could be made from 20.0 g of solid sodium hydroxide (and an unlimited supply of water) ?

A. 1.0 dm3 B. 0.5 dm3 C. 0.25 dm3 D. 2.5 dm3 E. none of these

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  1. 15 December, 16:34
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    D. 2.5 dm3

    Explanation:

    Alright, first off, you gotta find how many moles Sodium Hydroxide (NaOH) has.

    20.0g NaOH x (1 mol / 40.0g NaOh (got amount from Periodic Table))

    Basically, it's 20.0g / 40.0g, which gives 0.5 mol since the grams cancel each other. Then we know the pyramid (mol / M x L) so ...

    0.5 mol x 0.20 M = 2.5 dm3
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