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Wewaii [24]
3 years ago
7

How many moles of sodium atoms in 255 grams of na2so4

Chemistry
1 answer:
solniwko [45]3 years ago
5 0
M_{Na_{2}SO_{4}}=142\frac{g}{mol}\\
m=255g\\\\
n=\frac{m}{M}=\frac{255g}{142\frac{g}{mol}}\approx1,8mol\\\\
1,8mol*2=3,6mol \ of \ sodium \ atoms
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Now put all the given values in this expression, we get:

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Therefore, the entropy change for the surroundings of the reaction is, -198.3 J/K

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