contestada

2.
Given the following reaction2Na2S2O3 + AgBr
NaBr + Naz[Ag(S203)2]
a. How many moles of Na2S2O3 are needed to react completely with 42.7 g of AgBr?

Respuesta :

Officialalehpeter

Answer:

0.454moles

Explanation:

Calculate the molar mass of AgBr

Ag=108

Br=80

Molar mass= 108+80

Molar mass=188g/mol

It's mole to gram question

2moles of Na2S2O3= 188g of AgBr

X moles of Na2S2O3=42.7g of AgBr

Cross multiply

188x=2×42.7

X= 85.4/188

X=0.454moles

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