genesislong1103 genesislong1103

24-06-2020
Chemistry

contestada

calculate the moles of 25.2 g Na2S2O8

Respuesta :

Stephen46 Stephen46

24-06-2020

Answer:

To calculate the moles we must first find the molar mass M

M (Na2S2O8) = (23*2) + (32*2) + (16*8)

= 46 + 64 + 168

= 278g/mol

Molar mass = mass/moles

moles =mass / molar mass

= 25.2/278

= 0.0906mol

Hope this helps.

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