Easy Explanation needed Watch

Mutleybm1996
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I've managed to do all up till the last question on my own but i got confused so dug up the mark scheme and was wondering if someone could explain why they times the 0.00492 moles by 40?

Thanks


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Veqz
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(Original post by benwalters1996)
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I've managed to do all up till the last question on my own but i got confused so dug up the mark scheme and was wondering if someone could explain why they times the 0.00492 moles by 40?

Thanks


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0.0492 moles is the amount of NaOH in 250cm3 of solution. It is multiplied by 40 because that is the relative mass of NaOH.
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Mutleybm1996
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Oh i didn't think of that thanks!


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Borek
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That's why it is so important to list units. 40.0 is just a random number, 40.0 g/mol is a molar mass.
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